Yup.Know the "feeling" or lack thereof. It's interesting, I have never been diagnosed with reynauds, but the symptoms you describe, I have. The forefinger on my right hand will go cold, just as you describe. Sometimes, it is just like the other fingers on that hand, but at times, it can get quite a bit colder than the rest of the hand, and yes, whiter than the rest as well. The temperature variation can reach 15 to 20 degrees colder than the rest of the hand. It usually doesn't last very long. In cold weather, it gets worse, sometimes losing feeling, as well the temperature difference.

As far as the feet, we are as they say, "in the same boat". The entire bottom of my feet have gone numb to the point that I can't feel the petals in my car. Driving has to do with what happens when I "Think" I have pushed on a petal. I adjust by the results. If I apply the brakes, or at least, think I have done do, what the car does tells me how hard I have pressed. It gets sloppy at times, and in traffic, I drive with both feet. The left foot is always resting on the brake. I can tell if I'm pressing too hard by the upper light in the rear window coming on. I don't want to go around "dragging" on the brakes. That ain't cool.

The PN has caused me to develop neuropathic "ulsers" on my heels. Looks more to me like massive blisters. I have been confined to diabetic socks, and open back slippers for 4 months now, and they are about healed. But, walking out of my slippers is an unknown most of the time. I can be walking out in the yard, and find out I've left one of the slippers behind, and don't even know it.
As you all know, PN ain't fun, that's for sure.