I'm a horrible person

So I got pregnant and told the father.. he said he wants me to get an abortion. I put my foot down and said no.. but then as days went by I thought about how much better my life would be without a baby.. I then drank alchohol and smoked a cigarette to make it easier for me to give him what he wanted.. before my eyes everyone even my family was turning against me cause I was pregnant. The more I was alone feeling sick everyday the I just wanted to get the abortion and move on with my life.. my friend keeps telling me not to get an abortion but I already did drugs and stopped taking prenatal meds and I have no plan and no one to help.. I'm truly a monster and I'll have to lives with this choice