[FONT=arial, sans-serif]I'm 50 years old and about 18 months ago I found my test to be 425 total and free around 9. Decided to give TRT a go as I was feeling very blue at the time. Started with the pellets, but my doc got it very wrong and my numbers went off the charts. Took about 6 months to get me down to readable levels. Due to the bad experience I decided to switch to cypionate and hcg so I could be in more control. At this time things really started to go wrong. Firstly I was increasingly feeling jittery and started experiencing heart palpitations with [/FONT]flutter, skipped beat, or heart rate that’s abnormally hard, [FONT=arial, sans-serif]mostly noticeable at night. Sleeping also became more difficult and erratic. No one seemed concerned however and said its a heart arrhythmia and many people have them. I did not feel normal. Then things got even worse, after coming home from a trip to Europe I got a PE in my lung. Was put on Exarelto and my GP told me to get off the TRT. I obliged. Eventually my heart arrhythmia and associated feelings disappeared and I returned to better sleep. However my libido also disappeared and I started feeling blue again. At one point I could not take it and took some cypionate and within a day or two felt much better. As I did not want the arrhythmia to re-appear I decided to try the testosterone gel instead of injection to see if that would make any difference. Dr started me on a very low dose of 50mg/ml 1ml daily. Feeling of Well-being and libido improved, but after about 6 weeks the the jittery feeling and heart palpitations returned. no skipped beats yet but these symptoms feel airily the same, so I feel that will be next. By the way when I was completely off all test, I took my numbers they had dropped to 300 total and 6 free. Really looking for some guidance on the heart palpitations. In reading the other gym related blogs, I've seen many complaining about similar symptoms when they are in a cycle, but they are on much higher doses of test and other stimulants etc. Do I need to be concerned, can these symptoms be reduced or eliminated. What is causing the symptoms. [/FONT]