Hi everyone, I have experianced palpatations in my chest on and off for these last couple of years, Gp told me to ease up on the coffee which I did to no avail. Last June I started to get a humming noise rather like a lawnmover or generator in my ears, comes and goes. Been sent for ecg etc. Started Levothyroxine for low thyroid. This is driving me crazy these last two days I've had it near constant, I do not have one without the other, palpatations are if anything stronger, noise in ears louder while I can hear it in both ears it is more prone in my left ear, when I do manage to get to sleep I end up waking durning the night in cold sweats. Has anyone experianced this and have you found anyway to helpful.