I'm the same age as you and I have this problem, too. Mine goes on all month long when I'm not on my period, though. I use a DivaCup (brand of menstrual cup) that can be used even when you aren't on your period. I use it to collect my discharge since it is inserted internally. It catches about 85% of the vaginal discharge that comes out because, unlike menstrual blood, vaginal discharge is secreted through the vaginal walls and not through the uterus so it is impossible to catch all of it - but it gets most of it. It's been working out for me for the past 5 months! If you're interested you can try a menstrual cup out. However, If you don't have any experience with tampons (big tampons!) then you'll have a difficult time inserting them. They also have no risk of TSS, are environmentally friendly, and protect you more than tampons when you're on your period. Best of luck!