Hello, my wife is having some difficulty during sex. She says it stings the walls of her vagina for a while afterwards and during, and there is lots of pressure on her lower stomach. We have been having this trouble for a few months now. We thought it was a yeast infection, tried Monistat, that helped for a small amount of time, but it came back fast. She hates the doctor, and practically refuses to go. What could this be, and how can we treat it?