Ok the Dostinex is a medical treatment to help control your prolactin level...
You sound to need the help of more detailed exam of an endocrinologist ...
You need I think thyroid function and pituitary gland exam and function tested
The high prolactin may be due to a common type of pituitary gland growth an adenoma which may be producing too much prolactin but may impair other pituitary hormones
You need an MRI of the pituitary gland and you need other pituitary hormones checked as the others may be TOO LOW ---
You need full evaluation of thyroid function as your symptoms do suggest that under-active thyroid function is very likely related to your symptoms ( feeling cold / tired / depressed / thinning hair )
I hope that this information is helpful for you
Let me know if you have further questions or concerns
I will be happy to get back with you
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Thank you and Best Regards,
Anthony Bray MD