At this age you should be able to give yourself a break for a few days without her rejecting you, if that's what you need to feel better. It does sound like you might have thrush, perhaps if you contact the ABA they will be able to get you some help so you can work out what is really going on? It sounds like the GP you saw is a douchebag with no knowledge of breastfeeding, so feel free to completely disregard what they said.