Cramping after sex as if I was on my period?

When do you expect your period to arrive?

I am on birth control but I am expected to take my first sugar pill tonight. I'm just a bit nervous because about 1 1/2 weeks ago we also had sex without a condom, I would just like to have a 2nd opinion

What happened sounds a lot like PMS.

Menstrual cramping and orgasms cause the same type of contractions through your uterus walls, one experienced as cramps, the other as the very pleasurable deep contractions of an orgasm. When you get close to your period, these two can get intermingled, and the orgasm might even cause menstrual cramps. It is even possible that the orgasm make you start to spot or bleed a bit earlier.

As long as you took your pills as prescribed, you are safe from pregnancy. The failure rate is so small when you followed the instructions and heeded the warnings, that it is not even worth thinking about.

Take care!