I am restless in bed and can’t sleep because I drank too much coffee and I’m worried about getting up early. By the end of the week I am tired, frustrated, angr

I am restless in bed and can’t sleep because I drank too much coffee and I’m worried about getting up early. By the end of the week I am tired, frustrated, angry, and disappointed with my performance. The author blames this on a 9-6 schedule. But honestly I think it's way more likely a problem with drinking too much damn coffee. Everything he wrote in that part hit home, i was experiencing it very badly... until I started limiting myself to one big caffeinated drink before lunch a day. It's improved my quality of life a lot, I am tired way less.