It's not normal to have back pain all the time, you must know this. If it were normal, you wouldn't be here asking - because you'd hear everybody all the time complaining about how much their backs hurt.
So no amount of internet consolation will help you with this. Go to a doctor!
This pain could be due to many things. What kind of mattress do you sleep on? Have you ever had problems with your back before? Have you seen a doctor?, etc.
I have no idea what kind of mattress I use but I know that this problem has been going on since a few years. I haven't seen a doctor yet but I know I should :/
So no amount of internet consolation will help you with this. Go to a doctor!