Hi your having it bad, right the first thing on the list is a , full blood count, with a thyroid profile.
Your symptoms sound to me like it could be thyroiditis, or thyroid illness
You say your hair is fuzzy and your ankles have swollen and your fatigued, all these symptoms are typical thyroid symptoms, usually underactive thyroid.
Heartburn and carpal tunnel are symptoms off an under active thyroid.
I hope im right, maybe some off the other members might help here.
Im wishing you well.
Nicola
Oh! I forgot to add that my ankles swell up to about double their size every so often.