so my discharge has a sour/acid smell, but it doesn’t have a weird colour or anything. i also don’t have any symptoms, like it’s not itch, it doesn’t hurt when i pee or anything, and it just smell when it’s in my underwear, because when i touch my vagina it doesn’t smell, what can it be?

You might be a bit dehydrated, trying drinking more water and see if it helps.

I think it's normal for discharge to have some smell, vaginas are generally acidic