I'm 27 year old female diabetic(contolled) for a year now my pulse has be abnormally fast reaching to 171 bpm. I was put on metoprolol 25, the 50, now I'm at 75mg my blood pressure is always normal or on the low side 101/69 but my pulse with still be out if control. I have had an EKG,holster monitor, Ecco, and X-ray also blood work to check my thyroid and for a ton of other things, the drs can't find anything! This is ruining my life ..... Please what can I do??