I asked my girlfriend (hypothetically) If she would stop taking drugs if I said it was a problem for me. And she said NO

You're kidding, right?!!

The fact that it isn't a problem for you is what disturbs and concerns me. Also that your girlfriend refuses to stop and refuses to see that her habits could kill her.

I think she needs an ultimatum and if she still says no again, I would be long gone. Who wants to raise children with a drug addict who passes it on to her baby and doesn't even love herself enough to do better or get help? She also has no respect for anyone else nor consideration. This is a big problem. Or it should be! This is unacceptable and totally selfish behavior. What future does she have unless she gets off of these drugs? Same for you. If you love her and she's willing to allow someone to help her get her life straightened out, then do. But if not, it's the highway! You will do yourself and her, no good, supporting her and her habit.

And helping her, that's another good way to see if she really loves you or not. If she chooses the drugs over you, you've got your answer, so what will you do? I hope you do the right thing. And also if she loves you, she'll let you help her. But then again, you have to ask yourself is she in the right state of mind to be making right decisions.