Hi, I take 75 mcg of levothyroxine for my hypothyroidism. I happened to miss 5 days of my medicine and I took double the dosage (75 mcg*2= 150 mcg) for next 5 days without having more knowledge about taking double dosage for 5 days. After 2.5 weeks, I started having light headedness during nights and in middle of the nights if I wake up and even during the day sometimes, slight unstable in walking, discomfort in neck and feels head is pressurized inside. I got my blood work done with physician and my TSH levels are lower than the normal range. Then, after reading online, now I realized that levothyroxine should not be taken overdose. I am still waiting for my physician recommendation. Is this 5 days overdose cause life threatening or any other long term health impact?

Please respond ASAP, this will relax me as I am stressed out right now.