How does backache feel?

1, I don't know why, I'm so tired in the first week of school, my back hurts, my neck hurts, my eyes hurt, and I feel sick everywhere.

2. I'm exhausted. I have a backache when sitting and an earache when wearing headphones. I hope I won't live up to myself.

I was woken up for almost an hour, with leg pain, lumbago, backache, cervical vertebra pain and arm pain. I want to go to bed early, but I'm awake because of work.