Thank you all for your comments and suggestions.
When I first went to my primary doctor about my lower back pain, she sent me to PT, I did not have any other diagnosis, no xray, no referral to a specialist. The pain was more in the middle of my left buttock, and I thought maybe I messed up my back for doing fast walk on the treadmill for months, maybe bad posture on the treadmill. After the 2 months of PT, the pain decreased somewhat but moved up higher near the waistline, PT said it was a good sign that it moved up, and I was done there.
I was taking prescription ibuprofen a lot, but it did not work any more, the pain patch works a little better. I used them when I was really miserable.
I have been with this doctor for about 3 years, my previous long time doctor (over 25 years) had moved out of state. This new doctor is fairly pleasant, but I think she is tired of me going back. Unfortunately in the last year and a half I have had multiple medical situations that required me to see her, stomach problem (did end up treated by a gastroenterologist), then bad frozen shoulder, then lower back pain, and lastly vertigo. So maybe the doctor thinks I am a hypochondria. She has been very reluctant to give referrals.
I finally broke down to go see her a couple of days ago, I showed her where the pain still is, and asked if it could be some other problems. She said it is the back and I need to keep exercising. I asked if I should have an x-ray or other diagnostic testing, she replied that it is arthritis, one can’t do much about it except pain med and exercise.
I really don’t want to be whiner and complainer. My H tells me to switch doctor, I am not sure what to do as yet. I am frustrated because like @MichaelNKat said, I don’t know exactly what is WRONG, what caused the long term pain.