3 days of no sleep isn't nice but sometimes we have to go through a little bit of sh;t before we get better. I didn't sleep well/much for a week and a half but then I slept like a baby. Things do get better in time.
I am sure that you could sit this out til morning so you could go and get yourself some help and support. Both medical and help with all the psychological stuff and whatever your bad memories are. Obviously you're aware that alcohol is a very temporary fix and it makes everything worse in the long run.
I hope you find the help you need x