I want to end my pregnancy

So I found out last Monday I'm preganat. now normally id probably be excited or happy but I'm not. I don't want this pregnancy and have decided to end it I already have two kids at 26. we are currently living with my parents which is not the best place. My mother has mental health problems and she doesn't take her meds. My husband really wants me to keep the pregnancy. But he doesn't help with the two we have already and he only works part time and has no intentions or moving out of my parents house. Yeah I know I'm going to get don't so it adoption is an option but it's not for me. I thought I would feel more guilty about because I'm Catholic but I don't i can't afford a other child. and I need to put kids I already have 1st. I made an appointment for this week coming up already I have plans I need to get a job and go back to school and get my kids out of my mother's reach. I have to put them 1st and that's what I'm going to do. plus its not like i wasn't protecting my self I was on the pill and kept track of my days.