I think I may have taken too many synthroid...How do I know if I should get medical attention? My regular dose is 100mcg...Im 31 years old...I was switching back and forth between day and night shifts...And I think I am confusing my days and nights...I ju

No. . No. You should be ok. Side effects of too much thyroid include: rapid heartrate, chest pain, fatigue, sweating. It should be temporary. You really need to make sure that you don't do this again. I suggest using a 7 day pill box to help remind you whether you took the medicine already or not. Best wishes.