I have brown discharge, stomach cramps and no period but i'm usually irregular. what is wrong?

Pregnant?: Even if you are usually irregular, it would be a good idea to take a pregnancy test if you miss a period. Urine pregnancy tests from the drugstore are very accurate. Brown discharge could be a sign of old blood. Cramping is a common symptom during menstruation, or it may be unrelated to your cycle. If any further concerns, a visit to the doctor will be helpful.

Anovulatory Cycle: Sometimes the ovary fails to release an egg and thereby produce needed hormones to regulate menstrual cycles. This can be due to being overweight, a thyroid disorder, poly-cystic ovary disorder, or just because. It's important to rule out early pregnancy or a complication of pregnancy (miscarriage or tubal pregnancy). Time to see your ob/gyn.