Spotting Question

M

I was wondering if anyone else is going through this or might know what’s going on with me! Every 2-3weeks since I was about 6 weeks postpartum I will start cramping and then will have spotting for 3 days! I just started getting cramping again today, if I start spotting again this will be the 4th time & I’m 3 months postpartum. Also I stopped bleeding around 4 weeks postpartum & I am exclusively breastfeeding.