Stomachache from past 3 months. Pain?

One of my female friends had took an ipill on 23 January and she has bren having a stomachache since that day. She has a pain around her lower right stomach and under her belly button. Although the pain usually goes away on it's own but it occurs 2-3 times a day sometimes around the area under her belly button or lower right stomach or both. She consulted a gynaecologist last week and the gynecologist prescribed her a few medicines ( i have attached the prescription) the frequency and intensity of this pain has decreased (it occurs for about 1-2 times in a day and it is usually like a pinch kind of pain that gradually goes away in 2-3 min). Her dr has asked her to continue the rpzyme syrup for next 15 days more and if the problem persists then she might have to undergo ultrasonography. What could be the cause of this pain?