My pregnant girlfriend claims to be a addict. Red Flag?

I really think that people don't change a lot once they get to late teens/adulthood. you can do better than her. What's to say the baby is yours? Are you ready to have a baby with a woman you've been dating for 7months? Is she staying with you so you'll look after her child? If it is your kid, you have responsibilities, though I think you have a pretty high chance of not being the father. ALSO- why oh why were you not using protection? SERIOUSLY!