Levothyroxine Sodium and medication

For the last year and a half I have taken Levothyroxine Sodium 50mg, now increased to 75 mg. I have gained a great deal of weight and developed arthritis in both knees. Some days my knees hurt so bad I can hardly get out of bed. Since my medication was increased to 75mg. I have been itching like crazy. It is not continually, but at times I just go into an itching fit. Please help! Is there any other thyroid medication that works without all the bad side effects?

I have taken this Levothyroxine ever since I got Thyroid Cancer in 2006. And thank God I am free from cancer now. My main problem now is that, sometime I really don't know what was wrong with me and get confused over my own feeling. I do have cramps, sleep problem, headache, menstruation problem, mood swing, panic attack and always thinking of a negative thing eg like am I going to die. It has been bothering me since than. Please help I just wanna know is this really due to the medication or its really that I am going to die. I am very confused at times when feeling this side effect. =(

I have been taking levothyroxine for about 10 years now, i have had the following symptoms with them, weight gain, hair loss, mood swings etc, but i can also put it down to having a Mirena coil. The main thing that has concerned me is that i started to have panic attacks over a year ago with severe depression to go with it, my life was fine before that, had no problems, 3 wonderful children, my life was great.
Does anyone know of any other medication/natural products we can take?
I'm just so fed up with feeling like crap all the time.

i have just been diagnosed with auto-immune hypothyroidism and have been prescribed 25-Eltroxin sodium. I've also been trying to conceive. At the time of starting my medication I was coming up to ovulation. On day 13/14 of my cycle I was worried as I noticed significant breakthrough bleeding (bright red/with clots). I am waiting for my temperature to go up to show that I've ovulated but it hasn't happened yet. My bleeding is lighter now, 5 days on and brown in color. Can anyone explain how/if thyroxine can cause this as I've never had mid-cycle bleeding before. I have been bleeding for 4 to 5 days now and its not as heavy as it was. What is happening to me?