Vicky, mine alternates between cold and hot. The coldness is what I have more of though (unfortunately). I will have an icy burning sensation in my leg and my back. My fingers will either be cold and purplish-blue or they will burn and get super red.
How are your finger nails? I have read and understand that a lot of RSD suffer-ers have ridged finger nails. Mine are horrible! You can see the ridges, and they seem to be brittle and are awful to cut.
I hope you don't have RSD, I hope it's something more simple. RSD is a monster.