A cyst in the ovary can get rotated or ruptured.Size is not the criteria.A small cyst can also rupture.
In November,it was a simple cyst
If at all it is ruptured,better go for Diagnostic laparoscopy
where the cyst can be visualised directly by keyhole method.Depending upon the condition,the next step will be decided.If there is ongoing bleeding from the cyst ,it can be arrested.
Please take Antibiotic like Cefuroxime
,Anti inflammatory drug and antispasmodic like Dicyclomine
Wish you speedy recovery