My back hurts....could it be my bed...when i walk i feel it in my hip....my dad had a hip replacement...is that genetic?

Several questions: You've asked several questions! back pain at your age is generally benign and will almost always respond to basic conservative treatment - physical therapy, increased activity, exercise, good diet, etc. The bed gets blamed a lot but in truth, as long as you have a decent medium firm mattress, it's fine. Hip replacement is usually done for arthritis which is a normal aging change.