It would depend I suppose. With my mmc, my symptoms continued until I had the D&C. With my other 2 miscarriages, my symptoms were never terribly strong but started fading with the bleeding. With my daughter, my symptoms started at 4 weeks and then at 7 weeks I lost ALL symptoms for 3 days and had also had a heavy red bleed and terrible cramps. I thought I had lost the pregnancy, but a scan 5 days later showed baby with heartbeat and my symptoms came back. Also, I've read a lot of women report that symptoms come and go.