Ok the last period I had was March 25,2008, I have been having unprotected sex with my boyfriend since Sep of 2007. I was a little on the irregular side before I started taking birth control but once I started it everything got on the right track, even after I stopped taking the because I was always regular, but I haven't had one in 2 months and have had some light symptoms of pregnancy I have had more frequent headaches feeling sick, dizzy, I've taken 4 pregnancy test (most of them within the first 2 weeks) and all were negative, but I still feel like I am. My boyfriend and I are now getting excited at the thought of having a baby, but I don't want to let him down either. If anyone knows anything please help out.

Since you were regular, and not have missed two periods, time to give your doctor a call. They will likely do a urine test in the office, but perhaps they will have you go get a blood test done. It may be that the earlier tests did not pick up a pregnancy... or perhaps you have gone back to irregular cycles. See what results you get from the doctor's.