I am really upset today. What should I do?

So I am upset today because idk suddenly my stomach has been upset since morning. So yeah it's been feeling uneasy and I have no idea why it happened in the first place. I didn't even eat much outside food. In most of my solo outings in Central areas of our city Bangalore in India, I barely eat much just to save money and I mostly have coffee and juices and sometimes more occasionally some snack from Cafes and later at around 7 PM when I reach my neighborhood Munnekolala, I eat momos or Shawarma. I definitely had a pizza and popcorn with nachos in Shantiniketan mall of our city when we went to watch the Bollywood movie "Welcome To The Jungle" but it's been 2 weeks since then. Yesterday i did eat chicken kebab but it was prepared in home. So idk why this happened. But I am upset due to it. That's because today we planned to watch the brand new Bollywood movie Dhamaal 4 and this franchise excites me as the first movie Dhamaal was so comedic and part of my childhood.

I will still go to watch the movie anyways as the stomachache is mild enough but sadly my plan to eat KFC there today is cancelled. But I am even sadder as I planned to visit Jack's Bar tomorrow in Electronic City area of our city especially to try the Handi Biryani there again after a long time but if I don't feel better tomorrow, I won't be able to try it at all. Now at 25, I already miss Jack's Bar as I had several memories of eating there during my MBA 2 years ago so I wanted to reminisce there but yeah the stomachache was all of a sudden. Idk how it will be tomorrow tho.