Alcoholic husband..

I'm 36 weeks pregnant and my husband drinks like theres no tomorrow Friday-Sunday and his dad doesn't help. I've asked him several times to drink one or two incase I need to go to the hospital and he promises he will and always lets me down. This Friday he got paid and I told him to leave me all the money so he wouldn't waste it on beer, Saturday I gave him $20 for breakfast and lunch and he somehow came home and was trying to hide a beer he had in the truck but I caught him. Today he was doing fine I even told him I was really happy and meantioned to his dad I didnt want him to drink we went to visit and they go to the store come back with a 12 pack I later went to the store with my mil and sil and come back his dad got another 12 pack by then my husband was already drunk and both boxes were empty. I told him in front of his dad I had already asked him to stop and his dad got mad. I don't know what to do anymore. 😞