I have a 2.5cm spot on my Iliac Bone. Should I be concerned and demand an MRI?

I visited my doctor because of my lower back pain. It causes sleepless nights and decreases my daily activities. The pain is worse when laying down, sitting down or walking/running. My doctor sent me for an xray that showed I have a 2.5cm spot on my Iliac Bone. The doctor then sent me for a Bone Scan and here are the results. Should I be concerned and demand an MRI?
1. Increased uptake in the mandible more so on the right
2. Slight increased activity in the right temporal area is noted on the lateral view of the skull though unlikely to
be a lesion.
3. There is a small focus of mild increased uptake in the right posterior 10th rib. This is not well-visualized on the lumbar spine films. This could be a fracture though other considerations including neoplasia
are not excluded.
4. The uptake at the hips is mild.
5. There is mild periarticular uptake at the shoulders.

Age: 38
Allergies: Penicillin
Chronic Lower Back Pain/Sometimes mid back pain
Ongoing for nearly a year
No injuries, no personal history of cancer (although I have a huge history of cancer in my family), hysterectomy surgery in June 2016. No other surgeries or major illnesses.