Sciatica pain

This is my first pregnancy that has progressed this far. I am at 11w 4d. Is it too early for sciatic pain. My right side of my butt hurts so bad at times. Like certain ways I sit or occasionally walking. It almost feels as though I pulled something but I know I haven't. I've been so sick and exhausted that the only excersising I have been doing is walking. I guess I'm just curious if it's too early for this or if other experiences mama's have had this symptom this early. Thanks in advance!