Cramps after period

I had a grinding session last Nov. 10 and week after, I was having nausea and fatigue. But I got brown discharge last Nov. 24, and bleed the next day (Nov. 25), almost filled one pad, then on Nov. 26, almost filled a pad again but lighter than the last dy. Then not too much blood to fill a pad on Nov. 27. The next day, Nov. 28 and up to now, I'm just having brown discharge.

Last few months, I bleed heavier than this period, and in this period, the heavy days just took two days unlike my last few cycles. I'm thinking that I finally got my period, but I'm still nervous because I'm still having cramps and nausea even though I'm not having any blood right now. Am I pregnant? Or maybe ectopic pregnancy? Or any conditions?