So you take her to the doctor.

As for the rest... you need to just relax. If it's meant to be it will be, if it's not you can move on and use your experience to learn from. You have to stop being so paranoid. Ever hear the sand in palm analogy? You hold a pile of sand in your hand, the more you clench your fist to try to hold on tighter, the faster it slips through your fingers.

If she really is this great girl you have built her up in your mind to be, then all your fears are not necessary, are they? Cause she wouldn't do that to you. If you love something let it go, if it comes back you know it was meant to be. It's very true. Not saying you have to let your g/f go, but you have to have some faith in yourself, your girlfriend, and your relationship together.