C.R.
The symptoms that you are describing could just be that things have yet to be settled since you miscarriage but the fact that you are having some pain concerns me. Also that your breasts are still sore. I had all these symptoms and was spotting when I had my ectopic pregnancies. I don't want to scare you at all but both times my doctor told me that I was having a miscarriage but after some time I still "felt" pregnant and my tests kept coming up positive. I ended up going back to have a sonogram done and they located the pregnancy in my tube. It happened to me twice. One ruptured and required an emergency surgery.
The pain I felt was much more than cramps. It was VERY painful and almost couldn't stand up when they happened. At the very least I would suggest that you look up the symptoms on the web and check it out. It might be wise to seek medical attention.
Best Regards,
C.