I had to giggle when you talked about feeling like you were in math class trying to figure carbs on Atkins. I know what you mean! Then if you don't lose, everyone is telling you to look for hidden carbs, and figure your packets of Splenda, and this and that, and my head starts to ache! I too love the ease of SugarBusters.
Its interesting that you lost on SB, but stalled on Atkins. I am the same way, I did Atkins first and lost nothing, then switched to SB, and started to lose, though slowly. I am insulin resistant too, as well as hypothyroid. I have read that your thyroid needs carbs to convert the T4 it makes to T3. I thought that was a bunch of hooey, but in my experience, I lose when I eat carbs, and I don't lose if I don't. By any chance, have you had your thyroid checked? A lot of people with borderline thyroid problems are never diagnosed, because doctors think if you are in the normal range, you are ok. Normal for me is way at the low end of the range, and I did not lose until my doctor dramatically increased my thyroid replacement hormones, and gave me a supplimentary T3.
By the way, 24 pounds in six weeks sounds more like the hare, and not the turtle to me!
It would be great if you could do that again! I hope this time, you can maintain though. Nothing is more frustrating then losing the same pounds over again!
Have a great day!