The doctor put me on a trial dose of synthroid a while back because some my symptoms looked like thyroid although my blood tests were normal maybe a little borderline hypo. I took it (25mcg) and it gave me some side effects so i stopped. I tried a half a dose last week for 3 days and it made me worse. I had brain fog and fatigue. Now I have been having some vision problems. What is going on? Will my body readjust and eyesight correct? I went to the doc and he said it could possibly be this. Could it have triggered other things? Thanks, its scary.