Help me please

So I’ve been a virgin for 18 years but I have been using birth control consistent, I get really bad cramps and I play sports. So I had sex my first time on Saturday the 22nd and I had a day until My sugar pills started. We didn’t use a condom. I haven’t gotten my period and it was supposed to be coming on the following Monday the 24th, why hasn’t my period come am I pregnant? I’m getting symptoms that my period is coming but it hasn’t come yet. Right now I feel really sick to My stomach like cramps I also skipped my sugar pills last month