Hi Susan. I’m no expert but you should not be in pain at 3 weeks post op. I would ring your Surgeon. Maybe sleeping propped up would be better. I bought a back rest from Argos and a memory foam V pillow from matalan. The v pillow has been good at night to sleep on with 3 pillows underneath shaped like a V. I’ll try attach a pic of my sleep set up. It’s so important to try get some decent sleep. I know how hard it is. I’m PO day 4 and have struggled. Xx