Hi, And Thank You...I Am A 38 Yr Old Woman,

Hi, and thank you...I am a 38 yr old woman, about 5'3" and weigh about 300lbs. Ive been overweight most my life, genetics and lifestyle...but I have been experiencing the worst back pain of my life in the last 2 years.
Bedsides the obvious of weight being the main issue, I had a back accident when I was 20 and have had some discomfort since that time. I'm thinking that it is not just muscular...any opinions???