Change life style n diet plan drastically first. Tab thyronorm37.5mcg one in empty stomach before breakfast for two months, not to stop u need follow up by MD physician.
With this
Add
calcium as thyroxine is calcium depleting agent so bones become weak.
Shalcal 500 one after dinner.
Add walk.
You can try changes but as u r a known case of pcos hard to work
Yoga
Surya namaskar
N baby pose
R very helpful. U can search in u tube SAURABH BOTHRA FOR SURYA NAMASKAR WITH MAT, CHAIR STANDING, SITTING VERSION.
SO AS BABY POSE.