Firstly, you did not have an established pregnancy
as there was no sac visualized. It could be a chemical pregnancy. In such cases a dilatation and curettage
is not essential. It is enough if a confirmatory sonogram is done along with noting of serum beta-hCG
titres, which was done. To know why you have the pain, you need to see a specialist for a clinical evaluation and also exclude any pelvic infection; a urinalysis
is necessary. Relief can be had with anti-spasmodics. Hope you find this information useful. Wish you good health.