Sounds like something you ate somewhere. Or if you have little one something that they brought home.
Have you had any broccoli, cabbage or such? This makes many people gassie (sp). Have you eaten anywhere outside the home? Maybe the food wasn't prepared as it should have been. Have you cooked something and placed in on your kitchen counter? Perhaps it was not cleaned properly. These are some suggestions only not definites.
Hopy you get relief soon.
The other S.
PS Whatever it is your body is trying to eliminate it naturally.