I know I have GERD and trigger thumbs. My feet turn dark and get very cold. Sounds like I have Raynauds phemomenon. I have some remaing severe hot flashes on high doses of estrogen. I am losing my hair on head, eyebrows and eyelashes.
While you are seeing DR and getting labs done, I would also ask for an ANA for lupus and anti-thyroid antibodies for Hashimoto's thyroiditis. It does sound like Raynauds which can exist by itself or be accompanies by autoimmune disorders.