Can my partner be to big?

Hi so I’ve been TTC and still no luck for years. Many of my friends and family say no to worry it happens when the time is right! At first I would get a lot of BV but now I’m good. Could it be that my partner is to big and goes to deep? He likes rough sex more than I do but it’s fine with me but I don’t know if that can cause a reason for me not getting pregnant? Please help