I am very sorry you are having problems. Your condition is also compromised due to your heart problems which have priority.
Your blood tests look fine but heart symptoms have to be taken seriously.
I don't have a heart problem but had constant and at times severe palpitations. They resolved when I was prescribed T3 to T4 and now I am on T3 only and haven't been to the A&E or Cardiac Dept since my heart and everything else is calm. Even though your FT3 levels are good we don't know if they are able to get into your Receptor Cells.
I don't know whether if you take Bisoprolol first thing and take levo later on would be helpful. I just wonder, till you see Consultant which seems ages away, maybe you could phone his Secretary and put your query to her/him and you may get an answer.
I know you have a heart problem but did you have palpitations before being on levothyroxine or after you were on levo? Maybe a small dose of T3 with consultant's agreement on a trial basis might relieve your aches/pains. Some people cannot tolerate levo for one reason or another.
This is an excerpt:
Liothyronine is given to rapidly replace the liothyronine that would normally have been produced by the thyroid gland. It doesn't stimulate the thyroid gland to produce greater amounts of thyroid hormones; it simply acts to quickly return the blood levels of liothyronine to normal levels.
I assume your dose of levo is 125mcg?
"I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions"