I'm on day 8 and my body's aching so bad...

Day 8 has been so bad, I don't know why. I usually wake up 2 hours before I wake up for school to drink the Sea Salt water so I can flush before going to school. So when it was time to wake up for school my stomach was hurting so bad and my lower back was hurting as well. So I decided to stay home instead. So I slept in a whole lot and when I woke up both my arms were asleep and all day today my hands keep falling asleep if I don't move them. It's as if my blood's not circulating right. I don't know what to do. All I know is that I'm not gonna start eating, cause I'm almost done and I know I can go through the last 2 days. But today has been such a drag, my body feels so weak and I'm hurting a whole lot. Is this suppose to happen on the last few days? cause ahhhh it sucks!!! Anybody else felt the same after day 7?