Hi Jacqueline, I know it's scary to be told to have heart tests. I went through this a year ago (and I'm 13 years old than you.). I had irregular EKGs and I had to take a nuclear stress and ECHO test to rule out heart problems and even a heart cath when they thought they saw another irregularity. But they all came out fine. I think doctors order these tests out of an abundance of caution. But all this created a lot of anxiety in me even though the tests were good.
The best I can say is trust your doctor and be glad she is looking into any irregularitites. So often, women's symptoms are over looked. If you have ANY doubts about
the test interpretations, then get a second opinion. And be sure to ask what the test results mean.
I'm glad you posted.