This is a usual complain by the patients of Endometriosis
The more elaboration of your present complaints and the report of your diagnosis and last investigations done is a must to give you a satisfactory answer.
First of all it is advisable for you to understand the disease and its course from your treating doctor.
You also can consult your doctor to know appropriate abdominal exercises
and food habits.
Antispasmodics can give you certain relief in your pain.