Post chemical pregnancy

I had a chemical pregnancy (assumption) last week. (At 4 weeks) The dr termed it "early miscarriage" saying it could've also been a blighted ovum. I stopped bleeding yesterday but still have cramps. I was assuming the cramps would be gone by now with the bleeding.

He has me getting blood work tomorrow' & an ultrasound next week. He said there may still be some tissue left and if there is we'd do a D & C, which kinda shocked me since I was only 4 weeks.

Help ladies? Advice?