@diana59 , I would insist on some testing. Mayo NEVER prescribes anything without further testing.
It's just so strange...seems most primary drs prescribe a bandaid, no tests. Mine does the same thing, so I rarely bother to complain to him...I wait till I go to Mayo. That said, there were times I felt like toooooo many tests were being done, so I now speak up about that, necessity only. I went through ALOT!! Hope you get to the root, and then only treat accordingly.