According to the data you provided, you might be experiencing pelvic inflammatory disease. In your case, the pelvic inflammatory disease does not have to be related with infection. The dilation and curettage is a procedure in which the inner lining of the uterus is actually damaged and might have caused inflammation in the tissue surrounding the uterus. When swollen, this pelvic tissue might out pressure on the pelvic nerves, thus causing the pain.
You might want to have another blood test including inflammatory markers (C-reactive protein being one of them).