im 25, i have an under active thyroid which im taking medication for and have for the past 4 years but over the last 7 weeks iv been unable to leave the house. i feel very weak and tired. i get chest pains and sometimes in my breasts, my heart seems to beat very hard and feels heavy in my chest, i sometimes feel very shakey and cold but i also have different bowel movements, they are very soft and have mucas too. i get a pain in my left side just above my hip. im really worried as its gone on so long and iv been taking my tablets so i dont think its my thyroid. im too embarssed to see my gp but im also scared its something serious. can you help please?