Scared and just want to vent

So I just found out on Thursday I'm pregnant. I'm starting my new job today and I'm only allowed 1 week of leave. I have to get surgery on my tailbone because doctors found a mass on it. I want to give my baby up for adoption, I'm 20 y.o and I haven't finished my degree yet and I know it sounds selfish but I want to enjoy a few more years before I have kids. My husband is 24 and he keeps saying who knows maybe we'll fall in love and we won't be able to give it up but I feel as if I'm already doing most the house work not to mention working full time and he has a small spending problem.

I could use some reassurance, my family doesn't even know we got married let alone am pregnant. I feel like I'm going crazy.