Head/Neck pain after driving hours

Hi, short context: I started an express course for the big motorcycle ticket last Wednesday. In 10 days you are through. In these 10 days, you drive two times a day each 90 minutes. Bike: initially Kawa z125. Now Kawa z650. I have extreme neck and headaches that don’t get better. My last hour was Friday afternoon. Now it’s Saturday evening/night and I feel like riding. Head and neck pain extreme. Legs are totally broken and generally feel i I expected it to be exhausting, but I don’t realize that the symptoms are fading. In summary, all the control lights are on with me and blink hahah. My question would be whether the “normal” is and if the body has to get used to the whole thing, etc. Thank you