Vaginal Inflammation

Hi everyone! I need advise on what to do about my vagina. For the past few years, every time I have sex with my partner my vagina swells up, gets dry and starts hurting. I’ve tried many things like making sure we are both super clean, using condoms, using lube, foreplay beforehand etc.... Nothing seems to work. The doctor just says to make sure we clean and foreplay. I have no symptoms of anything and my vagina looks healthy to them. Any advice? Recently, i started to be more wet, and no swelling but i need to maintain this and can’t tell what has made the difference