HYGIENE HELP

Okay I know this is gross or something but my pussy, vagina, vag, kitty cat or whatever you call it smells all day on the daily basis. After I take a shower it starts to smell bad again after a couple hours. I don’t know if it’s an infection or something, but I do know it’s really annoying to have to change my underwear twice a day. I know diet has a lot to do with your smells down there and I know that I could definitely start to eat more healthy things but my water intake is pretty good sense I only drink water unless I go out. Anyways I just wanted to know if anyone knows what I should do with my problem down there.