Burning urination only during period?

21F 5'3 and ~150 lbs. I have only had one UTI in my life and it was over a year ago. I've noticed that during my periods I have a burning sensation when I pee, similar to a UTI, but I don't think it is one since it goes away after my period and I never have any other symptoms (like urgency or fever or aching). I heard this can be a sign of endometriosis, but I don't have any other symptoms of that either? Like I practically have no cramps, save for maybe yhe first day, if any. Does anyone know what this could be?