Chemical miscarrage.

Last week Tuesday I started light brown spotting come wednesday it was a little heavier but barely much. I felt sick, extreme pelvic pressure back pain and horrid cramp they where so bad. I then had a huge gush of blood when I went the the toilet I noticed some clots in it which I have never had before. The cramping continued but I went back to very light/spotting after that. This was 3 days before expected period. I then spotted on and off until Saturday. Finally seen a Dr and he said he suspected a chemical miscarrage bloods showed nothing. Been cramping still but stopped bleeding no actual period yet. Has anyone had this?? 😳