Well, ok, here's the story, and I'll try to keep it as short as possible.

I have been on birth control for over a year now. Never had any real problems since I started it. Well, the month before last, my period didn't exactly come when it was supposed to. For a whole year it had started on the Wednesday of my placebo pills. Well, the month before last it came a little late (i think still on Wednesday but not at the usual time). Then, last month, it came on Monday (second day) of the placebo pills, which has never happened before. I chalked this up to the fact that I had been on anti-biotics, which I know can affect the pill, and then I had to take a Diflucan for a yeast infection which also affects the pill. Now, this month it has started today, on the Tuesday (third day) of the placebo pills. It hasn't started full force today but it's definitely there.

So really, I don't know what is going on. Why all of the sudden is it acting up when it didn't for a year before? I am currently heavier in weight than I was a year ago, and I know that weight can affect it too, but I don't know if that is what is causing this. If anyone has any ideas why it is acting up, please let me know! I'm sexually active but we have been using condoms ever since I was on the antiobiotics (due to the fact that my period has been screwey ever since then). Please help!!!

The medications probably threw it off.  If it's still not on it's regular schedule, it may be developing a new schedule, or it may just be taking time to go back to the old schedule.  The body often needs time to regulate itself.

def. the meds. as long as you are still having your period then there's nothing to worry about. if it gets too wonky you could always ask your doctor for a different type of BC.