Hi there. Sorry to hear about this. An odorous discharge is often bacterial in nature. Is it a foul odor? That is definitely bacterial in nature. Watery, greyish (maybe brownish too, not sure) foul smelling discharge is often diagnosed as bacterial vaginosis. This requires antibiotics to treat after a doctors visit. Is there a clinic at your school you can go to? By the way, women get BV even without having sex although it can also be passed sexually. It loves a warm, moist anaerobic environment. We create that after exercising, etc. in our underwear. So, just mentioning this as there is nothing to be embarrassed about if you go to the clinic. All women have this issue most likely at least once in their life. good luck
You should go see a doctor, I'm not sure that's really weird are you feeling sick or in any pain?