I could really use some advice please..

I am 37w4d pregnant, single and a ftm. My baby's father left about 4 months ago. Long story short, he was in prison for a year (he was drugs and drug dealer) got out, we got together and he had gotten his life together. When he left, he relapsed and since then has been more abusive and complete asshole. He claims he wants to be here for our baby but then is out doing drugs and dealing with people that aren't good. I filed a restraining order but he never showed so it was dropped. I'm showing signs of labor and he's been threatening me telling me I will go to hell if he isn't allowed at the birth. I truly do want him to be there but he's so unpredictable (especially being on drugs). He says I'm a pos if he's not there. I feel like I would be so stressed out. I'm stuck. I don't know what to do. I've done this all on my own and have gotten everything for my baby without him.