yes it can cause ALL the hypo symptoms, but the only way to know is to have all 3 tests done at the same time. TSH, Free T4 and Free T3
Vitamin deficiency can also cause conversion problems.
Have a vitamin deficiency test done.
I too ...sufferred with conversion problems, only to find out it was due to vitamin deficiencies.
Ask your Doctor to do the test.
It may surprise you.....mine did.
P.s
Sorry ...forgot to mention that once I was on Calcium/D combined and B12, my conversion problems went away.
I have been stable for many months now and its been nearly 9 months since RAI and 6 months Post TT.
Your doctor should consider doing a liver function test. Most of the conversion takes place in the liver and if you have issues converting - it could lye in there. Minerals and Vitiams play a definate roll in aiding conversion too. Along with Laura's comment - you should tackle all 3 thyroid tests too.