I feel for you. I started .5 levothyroxine about 8 weeks ago & just had blood test today to check my levels and see how the medicine is working. I can tell you, I initially felt better the first 2 weeks, but find myself back to feeling completely exhuasted, weak & shakey (especially my legs). I know how hard it is when you have kids that depend on you & you have no energy at all to do the things you feel like you "should" be doing. I think thats what makes me feel so frustrated, not being able to live up to my standards of what a "good mom" is. Hang in there & know that you are not alone. I too have heard that is can take some time to find the right dosage, and that it is a process. It's hard to be patient when you feel this way, but hopefully you start feeling better soon!