Why is my period 4 days late bad cramps and brown discharge and also very light bleeding/spotting?

Hormones: When your period comes, is due to the hormones in your body. Sometimes periods can be late due to pregnancy, you may want to take a home pregnancy test, just to be sure, if you are sexually active. Otherwise, it sounds like your menstrual cycle is about to start. Ibuprofen 600-800mg is best medicine for cramping. If cycle irregularity bothers you, can consider birth control pills to help regularl.