Back and Hip Pain After Abdominoplasty?

I had an umbilical hernia repaired and abdominoplasty to fix diastasis. I’m 10 weeks post op. I know I’m supposed to be walking more but it just hurts too much. My abs are fine but my lower back gets tight and hurts and my left hip hurts a lot. I just seem to be really tight in my abs, lower back and hips, especially my hip flexors in the front. Is this common? I wasn’t expecting this and don’t know what to do. I will be seeing my doctor this week and will also discuss it with him.