Currently slamming 9 beers per night

I know I’ve to stop, I have a date set for Sunday being the last day I drink forever more. I’ve been to rehab I’ve detoxed 100 times it’s just a cycle I need to break. But to get to Sunday without wasting the 10 x 10mg Valium/Diazepam I have to detox I don’t know what to do. I’m also mostly non smoking/vaping anymore except when I drink but I’ve been on a 7 day bender. I don’t drink all day until I finish work at 10pm but then I need to slam them to get to sleep at 6~ and stay in a decent state. Today I almost had a panic attack between 6 and 10pm. I need to continue to drink until Sunday because I have two events this weekend that revolve around drinking and it’d be impossible to attend if I stopped tomorrow. How do I make it through tomorrow with 8 hours of work (WFH) without almost going insane? I blew past the point of hangovers and I get withdrawals now instead if I drink for a couple of days back to back. I know this is the FINAL time I ever say final and I have the backup of everyone in my life. I just need to make it to Sunday night and I run a $100m project so day drinking isn’t an option, I need to be stone cold sober to do my job. Someone please help 😞

For the past few months I’ve been a 4 day per 2 week kinda bender but it’s still stupid and self destructive but I need to drink and survive without a panic attack that lands me in A&E before Sunday. I’ve been to A&E twice with what I thought were withdrawals but they were panic attacks brought on by withdrawals. I also live in a country that’s not very favourable towards treating addiction.