Cramps but no period?

Caroline

I recently got on birth control, and I should start in a few days but I'm usually a few days late so far compared to the meds. I'm not sure why, but I keep feeling like I have to pee but I've gone like three times in under an hour. I know that I usually feel like I have to pee all the time when I'm on my period.

Any advice or explanation? Just not really sure if there's anything to be concerned about or if it is normal?