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Low TSH, T4, FT4 but normal T3?

I was diagnosed with hypothyroidism several years ago in my mid 30's and I takes armour thyroid. Last year, I had to increase dose often because of lab result and how I still feel cold and has mild chronic fatigue. Last summer my primary stop increase the dose because I wasn't improving symptomatic, while lab numbers was in normal range they were worse than previous lab results, me to endocrinologist. I never got chance to see endocrinologist because i was tied up in deteriorating health that started in August, and got much worse last several weeks. I suspect it may all tied to my thyroid misbehaving.

I was seeing GI specialist(for constipation last fall, and unexplained spike in liver functions that takes 2-3 month to return to normal), Gynecologist(menstruation issues, had surgery to remove endometriosis last month) and Urologist(frequent urination, overactive bladder), and Hematologist (chronic low WBC).

A few weeks ago, my gynecologist office called me advise me to see endocrinologist because latest lab numbers was much out of whack. I will see local "routine" endocrinologist on March 22 and non-local university hospital endocrinologist on April 12  to get two insights. I wanted to get better picture before I see them.

Here are numbers:
TSH 0.194 ulU/mL  LOW (Range: 0.270 - 4.200 ulU/mL)
T4    3.9 ug/dL   LOW (Range: 4.5 - 11.7 ug/dL)
FT4  0.73 ng/dL  LOW (Range: 0.93 - 1.70 ng/dL)
T3    105 ng/dL  NORMAL (Range 80 - 200 ng/dL)

We can ignore TSH number because I am medicated and TSH number can be suppressed. To my best understanding if TSH is low, T4 or FT4 should be high within normal range, and since it is not so theoretically it point to problem with pituitary gland, but T3 is normal (hypopituitary would have T3 low, below normal range as well). There no evidence of non-thyroidal illness.

What are we looking at here? Any idea?

Here is list of my ongoing symptoms:
-Stomach pain, decreased appetite, nausea and vomiting, constipation, diarherra [Note: I went to ER for severe GI distrubance, they write it off as nasty GI bug, but it is still going on]
-Excessive thirst and urination
-Severe Fatigue and weakness
-Headache (frontal), pressure in head along with lightheadness and dizziness
-Pressure behind eyes, especially left eye
-Electric static/shock sensation in left side of brain only
-Mild Sensory overload/Brain fog
-Sensitivity to light and
-Intolerance to cold
-Drench cold sweats along with clammy skin that may last weeks then stop, only occur when I am asleep (during day or night), not when i am awake
-coarse dry hair and skin
-muscle aches
-Menstrual issues
-Feel need to cough but it was unproductive
-Irritability and moody

Thanks for any input and thoughts.
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Avatar universal
I expect that you have more than one issue going on, but let's start with thyroid.  What is your daily dosage of Armour Thyroid?  How long have you been on that dosage/  Do you defer your morning Armour dosage until after the blood draw for thyroid tests?  What were your typical thyroid test results (and reference ranges) from the time before starting on the thyroid medication?  What was the diagnosed cause of your hypothyroidism?  Was it primary (Hashi's), or central hypothyroidism?  If tested for cortisol, Vitamin D, B12, ferritin, or calcium, please post results and reference ranges.  
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