Hi I have been feeling this strange feeling in my heart I take to be palpitations and am worried . Please may I ask for reassurance I am on. Levothyroxine 100 mcg and doctor has asked me to try alternate days with 75 due to t4 being over 20 on last blood test . I'm feeling v out of control as I was doing fine on 100 and wasn't feeling any symptoms of being over medicated . I also get b12 injs last one April next one July . Last result was up from 250 /300 to 2000 so it should be helping . I also take multivitamins . I also have haemachromatosis waiting on appointment . Peri menopausal also . I was going to start b vitamins this week in case it was this but now I don't want to start anything new as I want to work this out . But everything iv been on has not changed apart from stopping long term antibiotics due to tooth abcess . Marz kindly mentioned adrenal fatigue and was going to take some support for that . This is a new feeling . Sorry for the ramble I'm just worried . Just sent off vit d test so waiting on that . So my supplements have not changed . Except for Levothyroxine dose . I'm v tired on 75 and 100 But trying to do wat doc says even tho I don't trust her judgement . Is it this that is messing my body up ??