15 year old having a baby?

Hey im 15 years old not in school anymore i didnt finish my sec 4 im dating a 18 year old were both employed i make about 4000 a month and she makes well alot less but my moms putting me out so would i have enough to move out with my girlfriend and the baby and Would it be a bad idea to keep the baby because my girlfriends doctor told her if she has a nother abortion she might not be able to have another baby so im not sure what to do