How long did you give the combo of levo and
cytomel to work? And were you splitting the
cytomel? Quite often when we first change doses/add a new med, etc symptoms get worse, and we have to wait for our body to get to the change. Aside from that, palpitations can be symptoms of hypo, as well as hyper - I had them really bad when I was hypo and when my dosage was increased, they went away.
Why did you start taking your levo at night?