pinched nerve? 19 weeks pregnant //

Am I the only one who has gotten a pinched nerve so early in pregnancy?  
My left leg feels it all the time, not all the way down but kind of behind my thigh and my left cheek! 
It doesn't hurt alot but bothers.
The only way to aliviate it is kneeling and spreading my legs apart alittle and resting my upper body in a surface (bed).
Is this normal?