I have been on this birth control for probably about 5 months now. When I started I would get my period around the 2nd week. And then I'd get it the last week. I figured it needed time to kick in. Now that I have been taking it for a while, it's still doing it and maybe even more often than the beginning. Why is this happening? I do take anxiety meds but I don't think those effect the frequency of my period.