I had protected vaginal and oral sex with a prostitute 4 months ago and thought nothing of it. In that time I have got a girlfriend and she has now fallen ill and she has a bad fever and has abdominal pains. I am extremely worried I may have it and passed it on
You used a condom, therefore you had no risk. Your GF just caught whatever bug is going around right now. Tell her to wash her hands more often because proper hygiene helps prevent the spread of those types of illnesses.