I sympathise - do whatever you need to do which are what people have already mentioned - keep hips and knees in alignment and get thee to a physio/osteo/chiropractor or whoever helps.

Can I have a little vent? SPD is the only thing that has stopped me from TTCing again and at my age I really should not even be messing about. I think people underestimate the mental and emotional impact that being in constant pain can have.