Could I be, or am I dreaming?

This has happened once before, sorta.

I had a late period, and it kept skipping months (every two or three months it'd be late and randomly come back), was always abnormally light (my periods are normally normal to heavy flows), just to find out my hormones were playing tricks. I was put on bcp's to regulate my period. The issues i'm going through now aren't the same issues i had with the hormone problem, which is why i'm here.

Well, I was on bcp's for a year and three months. My doctor took me off them because he said he thought I had high blood pressure, which turns out i dont. The last time i used them was, October 31, 2009 (the day i took my last pill).

Well my last period was December 26, 2009. My period is every 28 days. (even after i stopped taking bcp's) I had unprotected sex with my boyfriend on January 5th and 6th. I had very light, pink spotting for one day, didnt last to the night, on the 17th. I've also been having mild cramping since the spotting, unlike my normal menstrual cramping which is very sharp and painful. I was suppose to have my period on the 23rd, but AF didn't get that memo.

Some things i've been going through for awhile now: weird food cravings(but thats normal for me), tired, dizzy/light headed, headaches, moodiness, feeling over heated or abnormally warmer from time to time. Every since Jan 16th my breasts have been very sensitive, it's very painful to take off a bra. Even during my period i never have breast pain, not even when i was on the pill.

Could i be pregnant? I won't get to find out through pregnancy test until Feb. 1st, so for now, i'm asking you if it sounds like a pregnancy issue, or is there something else I should be worried about.