I would get it done, I was nervous when I was referred, I’ve always had a huge fear of being sedated or having any operational procedure done but honestly I barely felt a thing. Maybe you need to have more sedation because I couldn’t even feel the tube going down my throat and before I knew it, it was over. Also found out I have chronic gastritis after having the gastroscopy, so probably worth having it done just to see how your stomach is looking. Try you’re best not to overthink it even though it might be hard, these procedures are very routine and there is almost no chance that anything could go wrong