I've Been Super Worried Lately Because I Can't Seem To

I've been super worried lately because I can't seem to figure out for sure, whoias the father to my unborn child? I found out I was pregnant 3 weeks ago. I'm not sure how far along I am yet, as I'm still waiting for my gyno appointment. I had sex with two guys in the same day. They were Both unprotected. The first guy did cum inside me but the second one pulled out. I'm leaning towards the first guy being the father. What do you think? I need some peace of mind.