I have been diagnosed with a hyperthyroid and it has come with all sorts of challenging symptoms such as fear, anxiety, weight loss, feelings of just being hyper. The most disturbing symptom, lately, has been palpitations all over the place (not just the heart). It has caused me a lot of anxiety. The other scary thing for me has been my bizarre sleeping patterns including what I can only call night terrors where I wake up with my hand down my throat, its as if I'm trying to rip out my thyroid in my sleep along with this is a very unpleasant feeling of gasping for air. I could go on and on, but this will do for now.