stabbing side pain 35weeks

For the past 2 days ive had stabbing pains in my right side. I can only explain them as getting stitch x100. Ive been lying down all day which eases it a little but as soon as i get up n try walking around it comes back. I was litrally crying trying to walk back to the car this morning it was that bad. Every step gets worse. Ive been to the hospital n they seem to think everythings ok n sent me home with paracetamol. Has n e 1 experienced this... i feel like im on my own??