I have had Raynauds for many years as part of an autoimmune problem. As you are observing, it can progress. I started out with a few fingers on one hand and eventually it affected all my fingers to varying degrees. It is in my feet as well, though that hasn't changed much since the beginning. This WOE has done wonderful things for me in other areas, but I'm sorry to say it has not made an appreciable difference with the Raynaud's. Fortunately, though, there are many things you can do to cope and help minimize its impact upon you.
Keep a pair of gloves with you or in your glove compartment of your car all the time. You never know when cool/cold air will trigger it. I have a terrible time with the freezer cases in the grocery store, and it can be worse in the summer when the cold in even the regular refrigerated sections combines with the air condtioning.
If you live in the north, buy yourself a pair of really good down gloves, and better yet, mittens. Go to a ski store and look at the Gordini and/or Grandoe brands. They are expensive but it's been my experience that nothing else comes close, and I've tried pretty much everything. If you buy them roomy enough--they come in sizes--you can fit a pair of glove liners underneath, and liners are wonderful. I have a pair of North Face liners that have a microfleece lining with a smooth outer shell and they are amazingly thin and flexible. When wearing gloves and liners and you need more dexterity, you pull off the outer gloves, leaving just the liners, and you can still dial your phone or pick up change. The liners also scrunch up very small in a purse or pocket, so they are ideal to carry year round.
Buy yourself some hand warmer packets and put them in your pockets in situations when you will be outside and exposed for a longer period of time. They are available mostly everywhere. I buy them by the boxload over the internet and carry some with me all the time. They are also great for those times when it doesn't feel appropriate to wear gloves, like when you might be in inside in a room where the thermastat is kept at artic levels. You just discretely put your hands in your pockets every couple of minutes and your fingers won't be purple. Over the years I have handed them out to friends and strangers alike who happen to mention their hands are doing strange things in the cold. I recently gave some to the man who pumps gas at the local station and they made a huge difference for him.
There is a cayenne-based warming cream on the market. I have never tried it, but I know someone with Raynaud's who does use it and likes it. He also has battery-powered heated gloves and socks. They are too heavy and awkward for me, but he is a serious outdoor person who would would carry a stove on his back if it meant he could stay outside just a little bit longer.
All the above is, admittedly, a pain in the neck, but you do reach a point where it just becomes part of your regular routine.
Good luck to you.
* Marieli, I just read your post after sending mine. Very good information and I agree that it all very murky as to the why and how of it. I have Hashi's as well (as does the friend I mentioned in my post) and have four out of five symptoms of the CREST syndrome which has improved over the years. Doctors have told me that if all someone has is Raynaud's, they call it Raynaud's disease, but if there are other autoimmune issues, they call it Raynaud's phenonmenon. Not that it means anything in particular except that it's clear nobody really understands it.