Pumping

I am exclusively pumping. My daughter is a month old and is able to sleep through the night now (got the okay to let her sleep by her dr). I didn’t think that not pumping through the nights would affect my milk supply…WRONG. I’ve tried everything to get my supply back up to where it was. I can get maybe 3 oz every 2-3 hours right now. Before I was getting 8-10 oz. My water intake hasn’t changed, I’ve been eating the same amount… I started waking up to pump now..nothing has helped. I’m heart broken. Does anyone know what could help being my supply back??