Help! Leg cramp/pain when wake up (2nd trimester)

This morning I woke up with a sharp, searing pain through my left leg (I was sleeping on my right side last night though). And when I tried to move it, straighten it, or get up, the pain would shoot all the way up my pelvic area through my inner thigh muscles. I tried standing but that leg had no strength at all. It took me about 15 minutes of very very slow stretching and massaging before I could finally get out of bed and now it’s slowly recovering. Has anyone experienced this in their 2nd trimester before? Does anyone know what it is? (Will consult a doctor also, of course - maybe in the next couple of days. But wondering if this has happened to anyone else before.)