My digestive system never feels normal?

I always feel gassy. I eat breakfast every morning and my stomach tends to growl until lunch. After lunch, I get bad gas and sometimes stomach cramps.
It’s not very noisy most of the time, but it keeps me from being myself and makes me anti-social as I am concentrating on my gas, not the people around me. I’m a sophomore in high school and it’s hard to go through every day feeling like this and concentrate on school and friends.
It’s rare for my digestive system to feel normal and unnoticeable.

Any suggestions?

(Gas-X and Beano aren’t options for me. Too embarrassing.)