Extreme unilateral urticaria (underarm), last underarm laser hair removal treatment was over 4 months ago, advice? (photos)

Since, I’ve had a red/pink irritation thats crazy itchy. irritation comes and goes. thought it was fungal infection at first. kinda looks like type of “rash” that people get between their fat folds. Ive tried keeping area very dry, no deodorant. have tried hydrocortisone, antifungal, and Benadryl cream. not all at once. nothing works to resolve just little relief. Some hyperpigmentation but not worried about that, itching is beyond miserable.