ttc! please help!

So me and my man are ttc and I got off my period about 2 days ago and I'm going through my fertile window right now. We just had unprotected sex and he came in me. For some reason I started bleeding s little and when I went to the bathroom this came out into the toilet. Is this just blood mix with his cum or does this look like my uterine lining? I'm confused. I'm hoping it's my uterine lining because I heard if the cum stays in you that means your ovulation and more than likely are concieving. Sorry for the TMI pic