Last night i had sex for the first time. We used a condom. We went two rounds but some how the second condom broke on the second round. I am on birth control but not to prevent pregnancy but to get my period regularly. Could i end up being pregnant?

You *could* ... Since no method of birth control is 100% guaranteed. 

However, the chances are slim.  Especially if you used a condom with spermicide.  Even if it broke, the spermicide chemicals would still be active.

Lol :) two rounds :p ding ding ding ! If you're diligent in your use of birth control you should be fine ... Except for Std's :/ I like the reference to two rounds though :) cute :)

Congratulations big mouth. Next time be discreet.

Birth control pills tend to work even if that is not the primary purpose for which they were prescribed, so the chances are slim.

Next time, look at sex as fun rather than a fight---you'll use less energy and be able to increase the number of rounds.