Sorry to hear about your issues Jeremy, I can understand your concern. However, don't jump to conclusions just yet; self-diagnosis is a hazardess thing. There may be many factors that your doctor will consider in making a diagnosis. For one thing, MS is not truely a heridetary disease. I´m sorry to hear about your sister, MS is truely a terrible disease, a close friend of my wife has it as well. Thet fact that your sister has it doesn´t give a substantial bigger chance for having it though.
Do you smoke? If so, your finger & toe issues could also be caused by a condition called Buerger's disease. There are also several auto-immune disorders that could cause similar problems, or certain types of vasculitis, or diabetes, etc etc etc.
In other words; there are numerous possibilities, try not to jump to conclusions and worry a lot by making your own diagnosis. It may be all not as bad as you think. I hope it is not!
Stay well!
I know it could be 100 different things and I'm not sure it is MS or Raynaud's, just an educated guess by process of elimination form what tests have been done. I have a few other issues that don't fall under the symptoms for either one of those diseases but I'm not sure if I'm reading into them more than I should. I have never smoked and I pretty much stopped drinking at age 26, I may have about 6 beers total a year if that. I'm physically active at work and home. I got a phone call from the neurologist office today and I'm able to move up my doctors appointment to Monday a 2pm. Hopefully this will speed up the diagnosis, as it seems that every doctors appointment is a step to another waiting period to another doctors appointment.