Critically Low TSH BUT normal T3 & T4 Levels???

[gpm]

OK i have been undergoing fertility treatments for over a year now! with 2 failed attempts at IVF one ending in m/c and about to go into another in a couple of months we did a huge hormone panel AGAIN to see what  going on . well i have gotten my thyroid checked about three times since jan!  about a month and a half ago i got b/w done by both of my  DRs, my RE only measures and goes by TSH and my endocrin (who i have been going to for over 10yrs treating my hypothyrodism) goes by T3 & T4.. SO i just got my results back from a month ago and my TSH level is critically LOW  (.0?)and my T3 & T4 levels were low but in range... so she upped my Armour (that i have been on this whole time) to about 5.5 grains...SO....after all that being said i am not sure what to do or what to believe and need help cause one DR says the other is wrong and  with about to go into another cycle i  want  this to be under control! and my endocr. DR says she might have to switch me to another med depending on my current b/w results(which i will find out on monday)...!!

all i know is that my RE says i am on too much thyroid and my other DR says i am not on enough and have absorbtion issues????

so ?'s

1. who and what do i believe about what is my  right level?? and who is right?? please explain?
2. what will happen when or if i switch to another med?


thanks for any other insight that anyone can give me as to what is right!???

[peter8620]

A related discussion, TSH very low but T3, T4 wnl and TPO high was started.

[shaheensyed]

A related discussion, Thyroid Tests was started.

[Mark Lupo, M.D.]

You are likely on too much based on the low TSH.  Armour will cause a lowish T4 but usually a high-normal T3.  I would be inclined to convert to straight T4 (levothyroxine) while trying to conceive, as the levels tend to be more stable.  The thyroid may have nothing to do with the infertility issues, but since you are hypo, this needs consistent control (ie, keep TSH around 1.0).  Thyroid antibodies may increase miscarriage rates, but consistent therapy is the best option in this case as well.

[gpm]

my levels from my May draw are: for my endocrin

T3 uptake              -   31
T4 free                   -  1.0
T4 total                  - 5.9
Free T4 index(T7)    - 1.8

[gpm]

TSH was 0.01