Sciatic Nerve troubles

P

I’m 19 weeks pregnant and since my 8th week being pregnant I’ve had really bad pain where my sciatic nerve is. I’m assuming it’s my growing uterus pushing on that nerve. Today it has gotten so bad it hurts with every step I take. I’m worried it’s just going to get worse. I’m a server so walking is an important park of my job! Is this common? Does anyone have any idea to help relieve the pain? Because I’m trying to work all the way up until the baby.