Dear Cowgirl212009 ,
from what your have written above yes there could be a correlation between the enlargment of the pitutary gland and the symptoms you mentioned , but inorder to make a precise diagnosis you need to do an endocrine workup , its a blood test
you do to know the level of certain hormones that would give an indication which one of them is responsible for the symptoms .
i would suggest you to arrange an appointment with an endocrinologist
i hope my answer helped you and please if i did i would appreciate if you give a high rating for it :)
please feel well and get better soon , Thank you