If you leak after sex is this bad?

Okay so I'm kinda worried. After sex I always drain everything out. The sparm doesn't stay in. Is this bad, does this mean I can't conceive. Does anyone else have this problem or is this normal? I thought after sex some of it would drain out but not ALL of it. I thought some would at least stay in. I'm sorry lol clearly im not experienced in this kinda stuff so please help.