Am I pregnant?

I started taking birthcontrol on the first day of my period and took it at exactly 10am everyday after that. I had unprotected sex on the last day of the active pills, AKA the day before the sugar pills started. He pulled out and did not *** inside me then i had a normal period. My Doctor switched me however From Tri-trintec to Aviane on the next pack of pills and I had unprotected sex on the first day of starting those, but once again he pulled out and did not *** at all. Now it is 2 days after I started taking Aviane and I have lower abdominal pain. I'm very worried that i may be pregnant. What do you think?