Periods after miscarriage?

I was wondering what any of y’all’s experiences were with your periods after having a miscarriage? (Or in my case a chemical pregnancy). So my miscarriage started on February 18th, and I bled for a full week. Pretty much like a normal period, maybe slightly heavier at times. On CD 22, so 3 weeks later, I started spotting and spotted for another 7 days. My OB doesn’t think it was a period, and I didn’t either. Well this past Saturday (CD 49) I started spotting again (I believe I was either 10 or 12 dpo, not sure which) and I had lighter flow starting yesterday, so I’m counting myself on CD 2 now. My question is, I have been having very painful cramps and feeling light headed, but just light bleeding. I’m used to having very heavy periods and with the cramps, I would expect to be bleeding a lot more than I am. Has anyone else experienced this? Should I be concerned? I am so exhausted after having a miscarriage, then random spotting mid-cycle, a 50-day cycle, and now this weird period 😂😅