Lost and needing advice!

So I just found out I am pregnant.. but me and my partner have decided to have an abortion... I don’t really know how to feel now. We already have two kids and our situation just isn’t right. We’re currently living in a caravan until we can raise the $30.000 we need to build our house. I keep telling myself that this baby growing inside of me isn’t alive. But I feel absolutely awful just thinking it. I feel like a terrible person, and I don’t think this feeling will ever go away......