HI...i have hypothyroid, iam using Synthroid Tablet ( 0.05mg ) now i feel chest pain ,Weight gain, constipation, & also big problem is sometime i feel my neck tight & i feel like inside neck has a air, what can i do ? i went to doctor they give PANTOPRAZOLE (40 MG ) to take morning & night be4 eat, but i still feel neck tight & chest pain , its move right , left & also constipation, please help me what can i do, any best treatment or medicine, let me know, thank u