Not understanding

su
I am so confused. Ok so I am breastfeeding my 15 month old and have been spotting a lot for the past two months. Last month my period was the 8th through the 14th that month I spotted 10day and my period was painful. This month I started on the 20th and I was in so much pain I had to stay in bed was medium flow and the rest of the time it was light until the 24th. Should I talk to my dr. About this? Two days before my period I tested neg on pregnancy test. I am just really confused and have been really crazy with emotions. My husband has said something to me about it. Just wondering what to do.