After a few weeks of feeling unwell now, and good old Gp saying thyroid tests are ok go away, I took the decision to take my own bloods and pulse for curiosity sake this week with reputable gadgets from Boots. Today, as my heart flutters once again, my blood sugar is 3.1 2 hours after my lunch and my pulse is 46! I am convinced my thyroid are not at optimal levels and I could be feeling better than this! I had RAI 6 months ago and now I'm on levo 75mg daily. Anyone else have these symptoms? Am I going mad, or at worst secondary heath problems?