My Vagina Smells Like Fart, Im In College And I

my vagina smells like fart, im in college and I only smell it during the weeks im in school. I could spend a whole week at home and never smell anything, but as soon as I come back to school I start smelling it again. I don't have a fishy smell. Its the "you need to take a shower" smell on that part. but this has been going on for months now and the last time I had sex I used a condom. I don't remember if I smelt like this before then, I only remember smelling it after. please help me, I don't have any money to give but I really need someones help because it very irritating to hear people talk about it, but don't even know that its me they smell.