Glad you like your school but sorry you are having problems. Periodontal work is tough and I had it 30 years agoa and glad I did. It is so important to your general health.
I also have raynauds and my fingers are slightly purple now even though sitting in a warm room with a warm fleece jacket. Mine was worse in the first year and a half but has gotten a little better this year. I am an outdoors/hiking/skiing person and tested my condition last winter in temps as low as minus 10F. Did OK but dressed warmer than ever and used layering. Merino wool socks work the best and there are merino wool sock and glove lines that you can put under your gloves when outside.
Inside, just dress warmer on your torso and it will help. Raynauds can be weird and I have experienced purple fingers and toes while walking in 65-70F degree weather and felt better when it is much, much colder.
There are meds that can help more serious cases but I have avoided them so far. Now that it is a little better I hope to never have to take them.
Mixed connective tissue disease (systemic lupus, scleroderma, polymyositis), Raynauds phenomena, Hypertension, Barrett's esophagus.
Meds: prednisone (6mg & tapering), 75mg imuran, lisinopril 40mg, maxide 37.5/25mg, norvasc 5 mg, folic acid, potassium, aciphex 20mg, multi vitamins.
Maintain your optimism and you can beat the odds.
"Although the world is full of suffering, it is also full of the overcoming of it." Helen Keller