Leg Pain?

I'm a virgin and have recently decided to try toys and fingering during my alone time. Whenever I insert anything I feel pressure, it doesn't hurt but it is uncomfortable and I've noticed that I get pretty bad leg pain. The pain normally starts at my hip and travels down my thigh, I only feel this in my left leg and it kinda feels like cramping. It also gets worse the more fingers I add or the bigger the toy is. Does anyone know why I feel this pain and what could help it?