Naval & Lower right abdomen pain.

Hello Doctor, My Age: 26 yrs My weight: 102 KGs My height: 5' 11 Feet My profession: Full time software engineer For around 8 months I have had very mild pain on the lower right side of my stomach. Usually, I would ignore it because it was very mild, sometimes I would forget about it as well. I assumed it was due to gas. 2 weeks ago I started Gym. Since then the pain has increased and the last 2 days I was not able to sleep on right side because of the pain on lower right side of abdomen. Besides the pain, I constantly feel very weak, even after I wake up I feel unfocused, and sleepy. This is very bad for my work-life. I also occasionally get headaches. Last week I had diarrhea like symptoms and I was in the bathroom for a very long time. I visited a local gastroenterologist and I would like to get your opinion if his estimations and suggestions are correct for my peace of mind. Herewith I'll attach his prescription.