Sounds very much like Raynauds syndrome, which I have and have had most of my adult life. It happens mainly in winter, but isn't necessarily connected with you beng cold. It just needs some trivial very localised change in temperature and your fingers feel cold, go white and when they return, your fingers go blue for a few minutes until the blood in your fingers oxygenates again.
Wearing fingerless gloves indoors helps, as well as making sure you keep your feet warm, I mean that, thick thermal socks help me keep Raynauds at bay. However, like Jaxjacky I suggest that you do mention it to your doctor. to be on the safe side.