My guess would be that it is part of the d&c. Usually after the d&c you can count that day as day 1 of your cycle so it is pretty unlikely you would get your regular period 4 days later. I had a d&c in Feb and I spotted on and off for about 2 weeks. Mine was mostly dark red or brown, which means old blood. I also had a clot in my uterus after the procedure so I would stop spotting for a few days and then I would start again, etc. It was very annoying. It could be possible that you have a clot too, that is just now releasing. I would say that it is normal and that as long as it's not REALLY heavy flow or accompanied with pain then you should be just fine. It took me 6 weeks for my first "period" to come back after the d&c. I am sorry for your loss. Good luck and feel free to talk to me any time. I have been there, done that....
Thanks so much for the advice. Just what constitues a "heavy flow"
I would say when you have to change multiple pads within like an hour.