Grieving future abortion

how can I grieve easier… I have an abortion set up on Wednesday I found out I’m about 3 weeks pregnant I can’t stop thinking about how horrible of a person I am for denying my baby’s life, I feel extremely suicidal I feel worthless and I don’t want to get the abortion done but it’s for the best, I’m 23 and I have nothing at all together in life, I drink about 3 times a week and when I do i drink a lot, I stoped drinking once I found out I was pregnant only because I felt guilty but yesterday got the worst of me and drank almost a whole entire bottle, I feel soooooooo soooo soooooo horrible I could scream and cry in a pitch black room right now I’m balling my eyes out as I type this. I can’t even imagine next Wednesday I have no idea what to do I feel so evil and wrecked and I feel like gold isn’t going to forgive me for my actions