I started spotting 4 days before my expected cycle ending the day after my cycle i've been taking geritol complete pills what could this be?

Happens frequently: It is not unusual for a woman to have some irregularities in her menstrual cycle. This can occur randomly and if certain things are going on. Increased stress & certain medications can cause irregular spotting. Your age would be important to know because as we get older that also can cause irregular cycle. Causes such as fibroids, uterine overgrowth and hyperplasia are common causes to eval.