I had been taking 200 mcg T4 (alternating 175/225) and +/- 18 mcg T3.
Due to deepening symptoms of hypothyroidism, I lowered my T4 from 200 to 150 on the 31st of January, then from 150 to 112 on February 1st, and then I stopped it completely and have not taken any T4 ever since. (I assumed I had a high rT3 due to my worsening hypo symptoms.) I went T3 only, and kept my 18-mcg dose.
My T3 dose has been the same (+/- 18 mcg) since January 15th, along with 200 mcg T4.
I was getting more and more hypo by the day (literally by the day) on 200 T4 and 18 T3. This is why I decided to stop T4 on January 30th and I lowered it to 150, 112 and then stopped it in 3 days.
The first 3 days (Jan 31st, Feb 1st, Feb 2nd) were very rough, however I seemed to notice a gradual improvement in my hypo symptoms, a reduction, which was weird enough, of course. Also I seem to be tolerating my T3 better and better. Before that the more hypo I was feeling, the less tolerance I had to T3. (It would give me an elevated heart rate and jittery feeling an hour after an 11-mcg dose.)
And today - Feb 4th - I am feeling very little hypo (I can so easily judge by the number of my skipped beats at least - my main symptom of low thyroid) and I took only 15 mcg T3 in the morning which resulted in absolutely no elevated heart rate, no shakiness...
I have mentioned before on this forum I had noticed I processed T4 very quickly.
Is it possible that my FT4 has fallen down to a more optimal for me level?
And it comes a time where the two levels (FT4 and FT3 - imagine they are lines) intersect, and the point of intersection is where I feel good at?
I am considering giving blood on Monday to see what my FT4 is. I might miss that level if FT4 falls further down. Maybe that is a FT4 level which divided by my FT3 level will result in a number less than 3. (Browsing through my labs I have noticed that I am not hypothyroid when my FT4 level divided by my FT3 level equals little less than 3 - 2.80 - usually.)
And maybe that is why I am tolerating synthetic T3 more now?
Is it possible that now with a decreased FT4 level and some exogenous T3 I convert T4 to T3 better?
I am really scared that this might be the answer and it may need a looot of fine-tuning of T4 and T3 dosages and I might skip the moment of the two levels (FT4/FT3) intersecting.
In this case, if I turn out to be right in my thinking, I need to reintroduce T4 again, at least 50 mcg of it, to keep my FT4 level "optimal" for me.
I was considering going T3 only for at least 6 weeks to clear excessive rT3 but now...
I am really surprised and at a loss.