Zero libido/sex drive

Since having my first baby 4 months ago I have had a low libido. It got worse recently due to needing to be put on an anti depressant. I have zero desire for sex and now can’t even orgasm if I wanted to. My husband just doesn’t seem to get this and it’s really bothering me. He asks all the time if I want to and I say no and then he says it’s like I don’t love him or am not attracted to him. It’s not that at all but he just doesn’t get it. His body hasn’t been through what mine has in just the last 4 months. I even got a supplement called “in the mood” and it hasn’t done anything either. Is there anything else I can do to try to boost it or get my husband to leave it alone?