What Causes Recurring Leg Pain In Middle Of Sleep?

i have a cold (had it for four days now, but still have clear mucus, and no build up in my chest). For the last two weeks or more, I've been waking up in th middle of the with leg pain. I'll wake up, turn on my other side and fall back asleep. The pressure will cease, then it will come back, I'll wake up and do it all over again. Ideas?