I am a 29 year old female. I was told that I have hypothyroidism. My TSH was 5.19 // my T4 was 1.15. ( Did not have a T3 test) The doctor gave me a three month supply of Levothyroxin 150 MCG. Started the medication Jan. 17, 2009. About 3 weeks or so after being on the medication I noticed that in the afternoons around 5pm I felt like I had no energy. One day about 10-15 minutes after taking my medication I started to feel "light headed", disoriented, started to dry heave over and over, started to sweat, and fell over on the bathroom floor. Also the next day I had a reaction. After that I started to break the pill in half and take that. I'm 5'5'' and I now weigh 111 pounds. My normal is around 130. I'm losing my hair still and it seems I can not gain weight. Hopefully I do not continue to lose weight. I have a headache for most of the day. My stomach gives me problems. I go from cold with chills to sweating and flushing of the face regardless of the temperature around me. I feel lightheaded sometimes. Around 5-7pm everyday I feel like I want to go to sleep Im so tired. It seems like what I eat and drink doesn't stay in me long; frequent bathroom trips. Also for about 2 years now I have had a yellow raised lump under my chin(right side; just under the chin bone). It has became swollen, red, and very tender to the touch off and on. Today I decided not to take the medication to see how I felt. My head felt funny all day long and I felt "out of it". My energy levels seem to be going down over time since I have been on this medication. I feel frail and I have aches all over my body, sometimes sharp pains. ( middle of left arm, left side of chest a little to left of the sternum, stomach, behind my knees, groin area, lower back.) Are side effects normal with this medication? Can a person be allergic to this medication? Am I on a high doseage of this medicine? Any information on this will be greatly appreciated. I am currently looking for a new doctor however I have had trouble locating an Endocrinologist. Thank you.