Hi Az,
Sounds like a nerve misfiring, I've only had it a few times, and after getting a few together (freaked me out

) I found that gently massaging the area they started from helped a lot, and they gradually faded and stopped (use oil or cream so that you don't make it sore). Normally it would just feel wierd, but I think it's the CRPS added on that makes you feel horrible and light-headed. I'm on low Lyrica too, but after a few instances of these, I've not had them again.
If it lasts longer than a couple of days, I would see your doc to get checked out, just in case.
Hope you feel better very soon, all these odd symptoms just tire you out trying to figure it ll out....
Bram.