I have had fluctuating levels of TSH in the last year, mostly due to a doctor's radical decision to cut my 100 levo to 50 and thereby plummeting me into hypothyroidism.
However, in August I had a TSH level of 0.22 on 100. Then, I took my 3 young children to meet family and became pretty exhausted! I felt my thyroxine must have been depleted as it was the same symptoms as the hypothyroidism I experienced earlier (extreme fatigue, cramps etc). I therefore took 125 and began to feel better.
On discussing whether over exertion could deplete my thyroxin, the doctor said it was probably just feelings of exhaustion and that my TSH would have been the same. However, my blood test from yesterday showed a drop in TSH on a dosage of 125 as follows:
TSH: 1.08 (0.4 - 4.0)
FT4: 1.17 (0.8 - 1.8)
(No T3 was tested)
Therefore, my thyroxin would have depleted with a substantial increase in physical activity...?
Also, my TSH level dropped to around 6.0 last year when my husband worked away for 6 months and I looked after our 3 children (without relief) who were then under 5. I am now wondering whether this 'unexplained' drop was yet another period of extreme fatigue as, ontop of the general fatigue, one child woke at 6.30am and another resisted sleep until 10 or 11pm....
I would greatly appreciate some explanations from this forum as most of the doctors I encounter do not reflect my experience.