What Causes Confusion, Poor Attention And Stuttering?

I have been becoming more confused, with stuttering and can t keep track of my attention. I have pain that has been getting worse over the last few weeks. It s everywhere. Elbows, shoulders, back, headache, etc. I didn t have this before. I am very active, eat well, and don t drink or use drugs. I am a 44 year old female. I have a hard time sleeping, and get maybe 4-5 hours a night. But when I do fall asleep, I go right out and sleep hard. I do have quite a bit of stress, but I have had that for a few years, so I can t see that as a factor.