Three and a half years out and exhausted!!

I was really tired on Tamoxifen and thought it was ONLY that but since my super ventricular cardiac incident of 180 beats per minute and now on medication for it I feel lethargic but not tired. I got a blood pressure monitor called color doctor for about $50 and in a minute on my wrist like watch it tells my heart rate and blood pressure and usually flashes up green. Only once it has gone to amber and I have had to increase my medication dose and now all good.
Not saying you have any heart troubles but the monitor could be a good investment to put your mind at ease. :)