Talk to Gynecologist on Vaginal Discharge Issue

I started spotting on 15th of this month when I was supposed to get my period. The discharge has been scanty since then coming in the form of clots. It stopped after 6 days and I was clear for one day. Then I suddenly witnessed the discharge again which lasted for 3 days. First, the dischatge was bloody in the form of clots but now it has been mostly brown with cramping. Now, I am spotting brown discharge at short intervals and have pain in my lower abdomen and back. It has been unusual for me as it has lasted more than 10 days. I am not married.