Could I be pregnant?

So Tuesday afternoon I had unprotected sex, he pulled out when he knew he was about to cum, cleaned himself up cleaned myself up and then we got straight to it and after 2-3 mins he fumed again but this time he said oh shit and then pulled out so I don’t know if he cummed in me or not and he said he thinks he didn’t, my period was supposed to come today and since Tuesday I’ve been farting a lot and peeing a lot more than usual can anyone help me ?