not pregnant right?

 I had sex with my boyfriend on Feb. 18th. We used a condom. He peed and then a few hours later he stuck in half of his penis into my vagina. He did that once or twice and that's it. After that he just took it out. He never ejaculated inside of me. I am on birth control pills (combo pill) and have been for four months now. I take it at the same time everyday. My period came on time on Feb. 28th and ended on March 5.  (according to my pill packet, and it started on the same day as the previous month) and lasted 6 days. Yet I am still freaking out about pregnancy. I know it sounds stupid, and I know how pregnancy works. I just can't calm myself. So I guess what I am trying to ask is, do you ladies think I am okay, that I am not pregnant? Since I had a period. I've been worrying myself sick.