Need a new bed

the bed I have at the momen is killin my back - I have had it for 3 years and I have hated it for 3 years maybe minus a week - it always puts just such a kink in my back like every morning I wake up with al lower back pain of some sort and I hate it - I have to get a new o ne - I'll give this to my daughter - she can sleep on a rock and it won't bother her