Can someone help me

Hi hopefully someone can help so I had sex about a month ago with a guy I’m no longer with he pulled out but it wasn’t fast enough the only thing that’s bugging me is I’ve been gaining some weight and my hormones are all over I got my period on January 13th a few days after we had sex and wasn’t supposed to start again till later well yesterday morning I started bleeding as if it was by period but way heavier this is probably the most I’ve ever bled which is not normal for me. I’ve been feeling so bloated more than I’ve ever been and it makes me think am I pregnant or could be or what is it or what could it be???