It' really good to meet you. Maybe you and I need to talk. The symptoms you describe sound virtually identical to my earliest symptoms, and I have gone undiagnosed for seven years now. It started with that feeling of being pricked inside by a splinter or a needle, and also caused muscle weakness. Maybe we could share notes and it might help each other out? If you would like to, please send me a PM and let me know. Good luck to you!