I am on Estrostep birth control pills and I have always had short periods never lasting longer than 3 days.. This week I am due to get my period and yesterday I had brown discharge for about 6 hours.. That was it.. I feel gassy, bloated and my boobs are sore.. I had unprotected sex 3 times this month and my boyfriend pulled out everytime.. And I havent missed a pill this month but I did once last month.. Am i pregnant?