I have been in a long term relationship for over 10 years, however, 6 months ago I started an intense sexual affair with a married man. Shortly affair the affair began, I started to experience a painful burning sensation around my vagina, which was accompanied by a white discharge. I immediately treated myself for thrush, having suffered previously, although the symptoms appeared more severe. When it failed to clear, I went to my doctor who examined me and prescribed more thrush treatment. After three lots of thrush treatment, I was terrified that I had an STD and went to a private clinic and was tested for several STD's as well as thrush. The results were clear. The pain seemed to start to clear, although after a weekend away with the other man, it returned almost immediately after sleeping with my long term partner. I was also distraught to see that my partner also started to experience burning pain on his penis, which was accompanied by a rash, which later seemed to flake. This has now cleared, and we are now using condoms. I continue to experience the burning pain, general discomfort and mild pain during sex and when urinating, It almost feels acidic. There is some slight swelling at the sides of my vagina particularly after sex. I still have a slight discharge although there is no unpleasant smell. Please help, I don't know what it is and how to deal with it.