Acupuncture is very effective for back pain. It is recommended by the World Health Organization, the National Institutes of Health, the American Pain Society, and the American College of Physicians. Its use triggers the natural release of opioids, chemicals from your brain that lessen pain and promote sleep.
But effective treatment does require that you allow the muscles to completely heal before returning to your usual activities. 90% of my back pain acupuncture patients get to the point of feeling much better and then blow it, re-injuring their backs.
Don't blow it. Continue to rest until the process is complete.