Your doctor is following the latest guidelines on the treatment of acute (new) back pain. Research shows most people get better on their own in the first two or three weeks. The best advice is to keep moving and active despite the pain.
Seeking treatment usually means care from a chiropractor, physical therapist, acupuncturist or other conservative practitioner. It doesn't mean you can't treat your current symptoms. Many doctors advise the use of over-the-counter pain relievers. Ice in the early days and heat later may also help. Rest for a day or two is okay but overall, it's clear that activity is the best medicine.