recurring burning urethral area

i (20F) have been experiencing recurring, strong burning in my intimate/urethral area for several months. the burning is worst at the end of urination, but i also feel it independently of going to the bathroom, so generally throughout the day.

sometimes, especially right after waking up, i have no or very little discomfort. but after the first urination, the burning starts, and then it occurs repeatedly during the day. sometimes i have some hours completely symptomfree, and then it suddenly returns.

drinking a lot really helps and often relieves the burning, but it doesn’t last forever. i am currently taking cranberry capsules and d-mannose, which help a bit but don’t fully stop the symptoms.

i have seen multiple doctors (gynecologist + gp). all urine tests and swaps were reportedly normal. i am often told it’s mental but the burning is real.

once i took antibiotics, after which i was almost symptomfree for a few weeks, but then it started again. externally everything looks normal, no discharge, no pain when touched.

this situation limits my daily life a lot, and the doctors in my area can’t help me.

i am grateful for any advice. if you have questions feel free to ask.