Could I be pregnant?

My husband and I have been trying to get pregnant for a few months now - I have never been pregnant before. I had irregular periods for about 3 years (we think due to diet) but have had them under control for the past year. I get my period about every 30-31 days.

My last period (in mid august) was normal. We had sex the day before ovulation and about 4 days after that I spotted off and on for the one day. Then I was fine and saw nothing for 3 days and then started spotting again and haven't stopped since! It's been about 3 weeks of seeing it daily..sometimes a little darker or lighter than the day before. I was due for my period on the 14th and even though I normally get my period quite heavy on the first day and it lasts for 4 days, this time it was as if the spotting just got slightly heavier, but only to the point where a tampon was coming out with blood on it, but if I didn't use one only once every 4-5 hours would I see actual blood in a small amount come from me. That only lasted the one day...I've been back to spotting a very light pink for the past 2 days...I have not taken a pregnacy test yet this time as I have been too upset everytime before when I have gotten a negative. I have had a headache for the past week or so and have not been sleeping comfortably for about the same amount of time. My lower stomach has felt very bloated, as if I am about to get my period and very much does feel that way today!
Does anyone have any knowledge on what might be happening?

Since I've exhausted my "I might be pregnant" conversations w/my fiance I figured I'd get all of my obsession out here.

I'm an average 28 day cycle. My Last period was 8/26. I ovulated on 9/9 or so. I had sex 3x that week w/the "pull and pray" method since I'm not on BC.

Here is where I got a bit "uh-oh" ... on CD21 6DPO (This was 9/15), I spotted brown. It caught me completely off guard. I'm not due for my period until 9/23.

On 9/12 I started to notice tenderness in my breasts and on on 9/13 or 9/14 I noticed a creamy discharge on my panties and thought THAT was odd. Then the spotting. Of course I get online and start googling /calculating...

As of today 9/17 (CD 22 7 DPO) I have now had a very very light brown mucousy thin "spotting" only when I wipe. However the center of my pelvis (base) is achy ... sort of full feeling. I have NO Idea if I'm experiencing way too early PMS (Although after snapping at a group of friends via email I would have thought so) OR if this was Implantation Bleeding.

Some other "quirky" symptoms...the past week I've been overheating around mid afternoon. To the point I'm undressing to be cooler and putting the AC on at work.

I've also had bouts of nausea and I've been VERY gassy and I'm also starving quite a bit lately. The other night I went to bed starving and couldn't understand why. I ate dinner. I couldn't wait for breakfast when I got up the next day.

The calculations would prove I'm right on target if I did indeed conceive. Am I wasting my time thinking "this is it" and how soon should I plan on testing if I can prior to 9/23 AF tentative arrival.

If you followed this, great job -- I can never follow these questions with dates, etc. so if you can give me any sort of yeah/neah that would be great!

Oh and I should say...I have a 12 yo daughter so it's been quite a while since I went through this and with her, I was 21 with absolutely NO Symptoms (easiest thing actually!!!)

Hi ladies, my period was suppose to start 9/13 or 9/14 and it still isn't here. I'm late by two or three days. I'm worried and confused because I had my tubes cut and tied in 2005. This is the FIRST time that i have been late. I have been feeling down for about two weeks, have sore breasts, and cramping like my period is going to start but when i run to the bathroom, thinking its finally here, there is nothing.Any insight would be greatly appreciated, thanks.

My last period was july 18th....I was due on august 19th....my period was 3 weeks late....I came on september 9th....is there any possibility that I could still be pregnant? I've never missed a period ever and I've never been 3 weeks late....so someone who knows can u plz tell me if I could still be pregnant

my last period was july 20, still no AF until now. ever since i had a period, ive never missed one. I took HPT on August 27 & Sept 3 - both negative. many are telling me that its too soon to take a test.... is there anyone that has gone through what i am going through... im so confused....

My last period was on July 22 and was due on again on August 23 but it never arrived so im approx 18 days late, have taken 4 tests over the last week and they have all come back negative!!!!!!!!!! I've got tender breasts, tired all the time and am peeing alot, went to my doctors last week where I was tested yet again and got another negative, I am really frustrated and dont know what to do next, any suggestions??