Help!!

Okay so for as long as I can remember I have had daily white discharge come out. It’s basically whenever I’m not on my period, I have discharge. It’s white in color, thin, and has a very funky smell to it. I know I don’t have an STD, so what else could it be? I keep thinking infection but it’s been constant for years and I feel like an infection wouldn’t stay that long. I’m very prone to UTI’s so infection is not completely out of the question. I also have very random periods if that helps. Like once every 2-6 months if I’m lucky. Also I am sexually active.

Thanks💋