Hello I had gone through your question diligently and I will try to help you out in best possible way your symptoms with history of unprotected sex might be suggestive of Infection or inflammation, trauma of the genitourinary tract most commonly Vagina. I see patients with similar complaints in my clinic and I would advise them for clinical examination and a battery of tests like blood for hemoglobin, CBC, Liver and kidney function test, urine culture and a vaginal swab for culture or an ultrasound to establish a diagnosis. You may require a course of antibiotics either tablets or vaginal pessaries under supervision of your doctor. Avoid sex or use condom until it heals completely Maintain good hygiene Have plenty of fluids who have will help by flushing off the urogenital tract. You should avoid fatty fried spicy and junk food or carbonated drinks Complete abstinence of smoking and alcohol is required Hope this answers your question Please write back to me for anymore assistance, I will definitely help you in best possible way Best wishes