Vitamins & Thyroid

Can anybody give me suggestions on the timing of taking vitamins
when taking Rx for thyroid?  I don't want combine things that shouldn't
be combined.  Here is what I take.  Is there anything else I should be
taking?

Synthroid
Multi vit
B- complex
Calcium Citrate
Iron (prescription)
Vit C

I am still pre-op but had a total thyroidectomy back in 2005 due to cancer. My endo says to take the synthroid first thing in the morning, then wait at least 45 minutes before eating. I wait an hour after taking synthroid to take my multivitamin. I wait until after my meal to take my calcium citrate. I know that the calcium in the vits and the calcium citrates can affect absorbtion.
Hope that helps.
Brandy

Thanks for all your help.

Darlene