I am a diabetic with hashi. I had been taking synthroid longer th...

I am a diabetic with hashi. I had been taking synthroid longer than metformin and had been on both for at least a year now. Recently I have been to ER due to heart palpitation and shortness of breath, so I had stopped my synthroid .1 for one day and felt better. So I stopped taking synthroid altogether, After 3 weeks I took it again because I was afraid not to follow my doctors order. 3 days into it, I was back to a high pulse, shortness of breath, chest pin and palpitation. I went to a different doctor, and he agreed that we experiment on the dosage and try a generic brand. I took .25 this time and I had the same reaction as taking synthroid .1. I have now stopped completely, I am hoping to that my doctor will listen to me and will give something else other than synthroid.