I was diagnosed June 2007 with Hypothyroidism. Just recently im getting the symptoms all over again.. cant get enough energy to workout, sleepy all the time, gaining weight. I was able to get down to 173 then now im way back up to 182-183 and i even got down to 179 by working out a couple of times and then next time i wanted to work out my body just isnt letting me and even tho i did the treadmill on sunday and i weight 179.4.. and on Tuesday when i was gonna workout again, i weighed 181.6 and this morning 182.8. Could it be that my medicine has stopped working? Do i gotta push myself even harder with the work outs. I recently lost 50lbs, was diagnosed with Type 2 Diabetes the same day as hypothyroidism and was told my cholesterol was slightly raised, and im only 21. Funny when i weighed 230lbs, i was healthy felt fine, lost the weight, and now i got all these problems. But now i gotta lose so that i can get healthier like when i was fat. jk.. i know being obese made me get these problems. So anyways.. Thyroid medicine.. how long does it take for your body to need the medicine adjusted again???