Can Chocolate Cyst cause a late period? I m one week late, and when i check with my doc yesterday, he said i had chocolate cyst inside. However i was hoping i;m pregnant , but i m not. I don t know if i can be pregnant with the chocolate cyst inside. The diameter is 4x7. The doctor prescribed me Danocrine 200 mg, Sensikol and Vomilat. Can you please explain why my doc gave me these medicines?