What on earth

Okay so this is terrible…but I was intimate with two men in a 4 week proximity. I’ll call the first guy John. We had sex a couple times but never came in me. Okay then I get my period🤦🏼‍♀️A couple weeks later I’m intimate with man 2 who I’ll call Jay. We had sex a couple times but he pulled out. I’m pregnant now and I’m wondering how to tell who’s baby it is😂or is there no way smh. If I got my period after I had sex with John could it still be his baby?