You should try taking additional probiotics as the antibiotics killed off all your good "bugs" too and you probably need more than you are getting from your yogurt.

I also had all the symptoms of hypothyroid except that I was very thin, and I had your other symptoms of adrenal stress. I finally came to the conclusion that the mercury was blocking the thyroid hormones from the receptor sites or was interfering with the conversion of T4 to T3. I didn't really notice any benefits when I was on thyroid meds than when off. So I just stayed off of them as it was causing my TSH to be lowered which tells your thyroid to make the hormone and I didn't want to mess up that process.

The flu probably caused all your nutrient levels to drop even more since your body was having to fight that off. I would suggest taking extra nutrients especially magnesium for your heart (mg is used up greatly during times of stress and you are under a lot of metabolic stress!).

Also, when I felt the way you are describing, I was so weak that I could hardly more, but did feel slightly better when I would get up to go the bathroom. I realized that I didn't have the energy to move around, but I needed to move in order to get my blood circulating. Try drinking extra water too right now to help build up your blood and flush out any leftover flu stuff.

Good luck, there is a light at the end of the tunnel, you just can't see it right now because you are down in the pit.