Oh LeisyLou. None of this is ever your fault. I've heard the one along the lines of "Some people just aren't supposed to have kids" a few times which I thought was ridiculous...particularly as it was coming from someone with 3 children who fell pregnant whilst on the pill. I told DH to let her know that she should never air that opinion in public again.
I really hope this isn't another mc for you. Big hugs and be kind to yourself. Take some time for you and your partner.
You've probably already had it done, but if not I would highly recommend getting full bloods done to see if there is something obvious that can be helped next time.