Pregnant Again..

I’m currently really conflicted. I’m 19 years old and I recently had a baby 5 months ago. My period was a couple days late and I tested yesterday. Turns out I’m pregnant.. me and my boyfriend ( also the father of my son) have decided that we aren’t ready for another baby. He’s only 21. We both dropped out of college to work full time jobs so we can support our son right now. We are working on getting our own place however, we currently live with his parents. Confined to a bedroom for the three of us and adding another baby isn’t ideal for us. We’ve decided to abort.. I’m only roughly 3-4 weeks along. But I feel like the worst person in the world for getting one. It’s something I never really saw myself doing.. i don’t really have anyone to tell or talk about this things and I’m just trying to keep my head together. Am I wrong for getting an abortion ?