Hello there -i have just been diagnosed with low thyroid after feeling really ill for about 2 years, which i put down to having small children! I have been on 50mg a day for about 7 weeks and last week felt terrible so have upped to 75mg. This gave me a really racing pulse, and the doctor suggested i take 50 and 75 on aternate days. My question is, i still feel a bit weird and panicy, and its turning into a cycle of panic, i think because i am looking after my boys and have no family near, apart from my husband. Can any one reassure me that i will eventually feel better? Are the side effects dangerous (i.e. racing heart). Should i carry on or change the dose again? Any advise will be gratefully received as i am in a state! Thanks!