Hello...I was just wondering how common it is to experience heart palpitations with Hashimotos? Been experiencing them several times a day for about a week now, but have never had a problem with them prior to now. Saw my endocrinologist a couple days ago and she didn't seem concerned about it. I have been prescribed levothyroxine 75mcg for about 9 months but now dosage has been increased to 88mcg as my latest test results revealed my TSH has increased to 3.7. Just wondering if this is related to my thyroid or if I should be worried about a heart problem. I do have an issue with anxiety and panic attacks as well. I have an appointment with my GP on Monday so we will see what she says. Any feedback from the forum would be appreciated!