Miscarriage Question

This is our first month TTC after a miscarriage in July that I got a D&C done. I never got a positive test this month but AF was due to arrive on the 21st I got some spotting late that night and only spotting Saturday, Sunday. Yesterday I got some heavier bleeding and today I have very heavy bleeding with clots and some major cramps, does anyone think I could be miscarrying? Or maybe it's just a bad period??? I am not sure what to think I didn't miscarry naturally on my last one... Idk let me know what you think! Thank You!