The only time I think there is cause for worry is if you see a big change in symptom frequency or severity since all the tests were done.If you notice new symptoms or you go from mild pain a couple of times a month to severe pain every day, then you might need to be rechecked, but as long as things stay in your usual range I would try to avoid the anxiety. If you can't control the worry on your own then get help with that. Anxiety makes every disease more severe and more painful. It doesn't make anything better.