Lorazepam when ttc

I am currently pregnant. Our little guy appears to have some congenital birth defect on his toes. I was a little upset when we found out, but I decided I will love my guy no matter what. My husband is still unsure about how he feels and my MIL is telling me it is all my fault and that I should abort and try for another baby, althoug my eggs might be "defective". That's not happening. I will keep my baby thank you very much, we have had amniocentesis done also by now and otherwise my baby is healthy, so I do not see any reason why I would abort a baby with a strong healthy heart and all the possibilities to be a successful adult in society.

Now to the reason of my post: I was cleaning our medicine cabinet and I saw Lorazepam pills. I asked my husband about them and he said my MIL gave them to him and he takes them to help him sleep! I was floored. This woman has been accusing me of having "defective" eggs, and she has been giving my husband unprescribed lorazepam pills? I will ask our doctor, but our appointment is in two weeks and I don't feel comfortable calling just for that. Does anyone know if lorazepam could have had something to do with our baby having this webbing on his toes? Especially because those pills are not prescribed to my husband. My MIL gave them to him and told him to take one at night to get to sleep. I thought he was taking some health supplements, I love and trust him so completely I never pressed on what it was. He was telling me that it was the little pills grandma recommends for sleeping. Since she is not a doctor I assumed she recommended some natural supplements. What do you think? Could these pills have affected his sperm since he was taking them while we were ttc (and still does, but I threw them out now)?