With the caveat that I’m not a woman, I’m around your age with pretty bad insomnia, and even I don’t feel that bad when I wake up. I want to sleep more and sometimes my back or shoulder hurt if I slept in a weird position now, but nothing like that. You should really go see a doctor and ask about that. It could be some idiosyncrasy, but it’s better to find that out now than to wait and realize it was something more serious that was easily treatable if you had gone sooner.