I have been taking levothyroxine sodium 50mcg tabs as prescribed by my md for 4 days. I have diarrhea, intermittent headaches, itching, pain in chest, frequent urination, and heartburn. I am very concerned. I have an unresponsive md who doesn t listen and since I am on low income insurance paid for by the State I cannot change doctors. I am a 70 year old female.