I hope you don't have the pain from your hip like I did with my back. I thought I slept funny as well so I'm not sure what is going on as I haven't had the vaccine. You're in my thoughts.I do have a small bruise and slight soreness, nothing out of proportion for sticking a needle in a muscle though.
But my hip is killing me. It feels like I pulled/overworked the muscle. I have no idea how this could be a vaccine reaction, but maybe? I guess I assumed that when "muscle soreness" is listed as a possible side effect, they meant a general all-over soreness, like you get when you have the flu, not one specific muscle acting up. So idk. Maybe I slept on it funny or something.