Partner drinking before baby

I need some opinions here please: my partner has drinking throughout my whole pregnancy, no biggy. I'm 37 weeks pregnant we are a few hours away from the hospital I am delivering at. Since 36 weeks, i have asked him to be cautious of how much he drinks and when he drinks so that IF i was to go into labour he is still able to drive me.

I picked up an over night shift at work, and told him to please not get drunk so that if something happens we are prepared. He promised me he wouldnt get drunk.

I called him just now (its 11pm) and he has already had 10 drinks since 5pm & had 4 people over at the house who are all drinking (he told me they were playing beersbee) and obviously I'm pissed because I asked for 1 damn thing of him too do & he didnt.

He thinks I'm over reacting and says he could still drive because it's been over 6 hours and with water in between (which obviously I said no, i would not be getting in the vehicle with him) & his friends are still at our house... still drinking...

Have any of you guys been in this predicament? I know I'm only 37 weeks & baby could be a ways away yet.. but this is our first. & I have no idea what to expect.

Please tell me I'm not over reacting?