I'm sorry I don't mean to be so skeptical but do we even know if she really had to go to the ER that many times or if she did? The way it played out and how she seems to want to have you keep 'checking on her' I wouldn't put it past some people to actually fake stuff to make people worry in order to gain sympathy.

That's just how this reads to me. You're doing the right thing. back off... let it go.