You need to be brave, its always a good thing to do those procedures as I am. You see manometry it can detect many different thing inside our esophagus, its best thing to do and determ of problem. We all learned our lesson and we need to change our lifestyle to improve completely. Everyone scarred, even me but do I have options? no I don't, I have to go through with it and see what I can do to improve it, if I have Schatzki Ring and Esophageal Spasm as doing Manometry, it would give me a chance to take medication to heal it or do a surgery to improve of those two symtoms, we must never be scarred of a little thing. Your life is in your hands, you know your body and you need to research how to improve it, for example as everyone says even you are not overweight but have fat belly, its best to loose the weight and slim it completely, because it can reduce a significant of your Gerd, its true stories what people say and mine as well, I was 115kg and now I am 78Kg, I lost 38kg it really improved my all over body of fats but I still need to improve my belly to slim it.
Do all tests and speak to your GI afterwords, you can ask many other way to improve your health, even cure it!
Exercise is every beneficial in our body and can improve everything! Don't give up in your life and don't wait like that, you need to move forwards and look after your body well and do all test.