Unnecessary weight gain / Thyroid.

I went through MRI Brain scan two years ago (i.e 9th march 2015) because I was having severe headache all the time. My MRI report showed that I have a Bulky Pituitary gland with suprior convexity (physiological hyperplasia) that time my weight was normal according to my height. ( age 26 height 5'4 ..weight -63) from last one year my weight is continuosly increasing my current weight is 74kg....earlier my weight never crossed this much. Yesterday I went for a TSH test and my tsh range is 7.41. I would like to consult a good Endocrinologist regarding my thyroid problem but I cannot ignore my MRI reports . My concern is my MRI report is two years old. Is it ok to show it to a doctor or I have to go for new MRI Brain scan again ? I have read somewhere that we should not go for MRI scan frequently. Kindly clear my confusion Thanks