Cramping, stretchy clear and brown discharge, late period. no discomfort, no odor, no stds. what could be happening ?

Late light menses?: Occasional irregular menses are common and of little concern medically if the patient is not pregnant. But cramping not relieved by otc meds should be evaluated as should prolonged or heavy irregular menses. As always persistent problems deserve evaluation by your gynecologist.

Don't know: Reasons for missed/late periods: low body weight, obesity, marked weight ^ or v, over-exercise, endurance athletics, breast-feeding, ^ stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, hormone irregularities, drug use, meds (i.e., birth control) or medical problems (i.e. PCOS). #1 reason is pregnancy.