I sympathise. I get the same pain and hate sitting for long periods. I tend to perch trying to keep weight of my lower back. Add knee and calf problems on and it is not a good mix. Got mri scans coming up and dread lying on the scanner bed as it is so painful on my back and you cannot wriggle as you have to stay completely still for ages. My son finds sitting for long periods at school difficult as it is uncomfortable. He gets back and neck ache.
Mum to son with hms,pain amplification,migraine,plantar fascitis,ibs.lactose intolerant,hayfever and numerous allergies. I have hms,arthritis,migraine,p.o.t.s,allergies,and others too numerous to mention. Acused of being mentally ill hence.....madmum.