Been there,done that. After nearly thirty years of holding a medical I was called in for an exercise ECG etc for an alleged T-wave problem. My AME was furious, as he had noticed it when I first started going to him years before, but thought it so insignificant that it wasn't worth mentioning. He said I probably had it since birth. Anyway, did the treadmill bit (they don't call it a stress ECG any more, you get the stress immediately on opening the white envelope), the T-wave was unchanged and medical renewed without further restriction or problem. So I hope the same applies to you. The only problem comes when you fill in an insurance form etc and they ask if you have ever been called in/referred for any tests. Good luck.