sounds like a pulled muscle, u will get pin killer and told to rest
i have back pain and keep getting told it was a muscle prob, after been examined by the oz it turns out it is the joints that i have a problem with and should get a new job, as the lifting is doing my back no good, am lucky if i can get 2 days a week in now, as am tired all the time with the pain, spoke to the dss and had a medical and got told there is nothing wrong with me and should be fine to get any job going,