Marie, I'm no expert, but when I see the last line, "abnormal ECG" it's enough for me to say, as Turtle suggested, get thee to a Cardiologist and get a full work up.
ECG is just a snapshot in time of your heart rhythm. That's all it is. I'm guessing you need a full work up. Echocardiogram, stress test, etc. that will tell you more.
Btw, tachycardia is basically a fast heart rate.
Your nervousness alone, is enough to warrant seeing a cardio, so that even if there is nothing wrong, you will,have your concerns addressed and your fears allayed
Good luck. Keep us posted.
Dx Age 64 Nov 2014, 4.3
BX 3 of 12 cores positive original pathologyG6, G6, G8 (3+5)
downgraded to 3+3=6 by Dr Epstein, JH
RALP with Dr Ash Tewari Jan 6, 2015
Post surgical pathology – G7 (3+4), ECE, Margins, LN, SV all negative
PSA @ 6 weeks 2/15, .<02, 4/15 <.02 7/15 <.02, 10/15 0.00 (new lab) , 1/16, 0.00
My Story: tinyurl.com/oo9x4aq