Your doctor's immediate thought was probably on a yeast infection or chlamydia as those are the two conditions associated with the kind of discharge you are describing. Have you let them know you are still experiencing intense pain?? Did they take blood for a herpes test? It is entirely possible that it is herpes and that's why the yeast infection meds may have burned more.
Let me know. Also, here are a few ideas that may help relieve the pain until you get the help you need:
Aspirin, Ibuprofen,or acetaminophen (such as Tylenol) may help relieve the pain you're feeling.
Applying ice packs to site of pain can offer temporary relief.
Bathing in shallow tub of water with drying agent (Epsom salts, Burrow's solution, etc.) may help dry out the area. Piece of cloth soaked in solution and placed on lesions can substitute for bath.
Frequent bathing may cause further skin irritation due to abrasion/drying of skin.
Use mild soap and gently pat area dry with clean, soft towel, or use blow dryer set on cool to dry thoroughly and reduce irritation to area.
Wear 100% cotton underwear and avoid nylon panty hose. Tight fitting clothes may also cause irritation.To reduce pain while urinating, try pouring warm water over genitals while urinating, urinating while sitting in tub of warm water or using toilet paper tube to redirect flow of urine away from lesions.
Please let me know how you're doing.