Had RAI at Xmas for my Graves' disease. So now hypothyroid. The last 2/3 weeks been suffering from disturbed sleep, waking at 1am/2am not being able to go back to sleep. So exhausted. Spent the last 2 days crying my eyes out! Is this normal for hypo? been put on levothyroxine 0.112mg on Friday. Will this sort out these symptoms I'm experiencing? How long till it takes affect?