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Judging by your emotionality ... I can assume that your stomach and intestines reflect your emotions on a bodily level.
Any anxiety, stress has consequences in the body.
Think about it :)

It was something I ate....
Full on infection

then it is necessary to accurately determine the type of infection and take measures against it.
This is a medical matter.
After that, you will have to deal with the restoration of the body. And that will be your job. Medicine won't help you without it.

The most important thing is peace of mind. Don't worry and don't be nervous. Everything will pass, and this will pass.
I'll hold my fists for you :)