After taking Levoxyl for 1 month, I felt more tired and both my l...

After taking Levoxyl for 1 month, I felt more tired and both my legs are swollen. I have difficulty sleeping, feeling difficulty of breathing. I stop taking Levoxyl for 1 week now. The symptoms are still there. Does anyone has an idea how long the side effect will last after discontinue taking Levoxyl? I feel extremely tired after walking only 1 block. How long will this side effect last ? If you have similar experience, please email me and let me know how long it takes to recover. My email is: ****** Thank you so much !!