Poor leg circulation. Call OB?

😴✌ • Ftm June'16 . Happily Married. Snark for life❤
When I lay in the fetal position with my legs curled at the knee, I can literally feel my circulation being cut off and my feet get the needle sensation you get when a body part goes numb. But if I put a pillow between my legs first I don't get the sensation. Is anyone else getting this or should i call my OB? I go in for a check up Thursday.