I’m very concerned with my discharge because after it’s dried for a few hours (on my underwear in my laundry basket) it turns yellow-ish and crusty. Is this normal because of the air?? I’m frequently tested (last test was March 11th - negative. Have 1 consistent partner, my boyfriend, but he did give me chlamydia in the beginning of our relationship over a year ago and we both have been tested and treated since).