Hello, your illness has no effect on your body, because if you do gastroscopy, it will enter your stomach through the natural cavity. In this case, it will only scratch the digestive tract mucosa, and it will recover in a week or so, so it has no effect on your body.
Guiding opinions:
If you suggest it, do it. There won't be any problem, but you are so young that I don't think it is necessary to do this kind of test. As long as you pay attention to your diet at ordinary times, you can definitely recover. You don't see anything wrong now.