Hi Babs,
Right down my alley (teasing), but I sure know what you are describing! That has also happened to me and the rheumy called it something or another (egads, can't seem to remember much of anything tonight

), and I also have livedo reticulitis as well. All I have to do is get cold and it parades itself in it's finest lace pattern (get it all the time in my hands/arms & feet/legs). Seems to be that my body likes to change color at will (purple/red/blue/and that weird white), very odd looking.
The Petechiae (picture on the left) is more like what I got that day and was lucky enough that the rheumy saw it for himself (he thinks that I also have vasculitis and is waiting for the "classic" rash. Knowing me, I probably won't ever have it being sero negative and all). And maybe one day something will "develop" up and then the rheumy will finally have a definitive diagnosis.
Take care of yourself and don't forget to keep us updated, okay?
Patze