Could I be pregnant?

I have been off the birth control pill since Sept 2012 and my cycles are irregular. Last month is was 30 days. We are ttc and this month is the first time I have used an OPK and I got the smiley face on CD20. Here it is CD33 and no period. I have had mild cramps since last week and it feels like I could be getting it, but I also have upset stomache every once in a while. I took a test Sunday evening and it was negative. I read something about the luteal phase being 14 days after ovulation, so I am wondering if I will get my period later this week or if I am preggo. Anyone else have these issues??

My husband and I have been trying for long time, we have three children currently. And I am experiencing a lot of dull back aches for the last week n half along with a really bad bloated feeling. I have never experienced any back aches or bloating with any of my past cycles and I am not sure if the pregnancy test I took today was positive or negative. I have also had some belly upsets latly.

http://tinypic.com/r/2dh8r6h/6

I dont know:( Thank you all for your posts(:

http://i1355.photobucket.com/albums/q704/MrsPete2/TEST_zps42f0dcd8.jpg

Does this look positive to anyone?

I'm 3 weeks maybe a lil more late. Last visit from AF was 16 DEC. Didn't realize I was late 'til a few days ago. Have taken HPT came back neg. Bought a digital one today. Will take the test. I'm making a dr appt tomorrow regardless of HPT results. Anyone else had this happen? I'd love to have a BFP but don't want to get hopes up. No spring chicken here lol.

In Oct I got a skin infection then pneumonia back to back and was hospitalized. I was given antibiotics thru an iv and then antibiotic pills for over 1 week. During that time i was so out of it from the meds i totally forgot my pill for that month. However when i came on my cycle in Nov (which was on time)I kind of shrugged it off and decided i'd get back on the pill. What i noticed was that I started a new pack of pills which could very well to my body seem like the 1st pack ever since i had not taken any in oct and my ovulation window was that tues to sat after my sunday start. so i have taken my pills each day since however, i am SUPER sluggish. Im always tired and sleepy. No matter how much sleep i get it seems like its never enough.

My question is could i have gotten pg that week of ovulation even tho i started the pill that sunday?