Re: back Pain
What your doctor did was pretty normal. There's a progression of steps that most of us have to go through with these back issues. First, x-rays, then PT. If that doesn't do it, further testing like MRI's and/or CT's and/or bone scans. Then hopefully you'll get an accurate diagnosis and a treatment plan, which may or may not include surgery. If your doctor doesn't hang in there with you and go the next round, time for a different doctor.
Stick around here. We're not doctors, but many of us have had serious back issues and can help you from our own experiences.
I wish you the best,