Help pls!!

Hi girls! So I've been to multiple doctors for vaginal odor & sometimes I have burning while urinating and they all continuously tell me.. There's NOOO Std or sti .. The burning only comes during my menstrual cycle! & the odor stays! Any home remedies or anything that could work? It's very unpleasant and embarrassing (which is why I'm writing anon ) 😂 silly, I know.. Please help?  ANYTHING that could help improve vaginal odor.. I've changed my diet & im Intaking more water so it isn't my diet.