Through Exercise I Strained My Lower Back. I Have Seen

Through exercise I strained my lower back. I have seen a doctor, he treated me with trigger point injections...for the first time the injections did not relieve my pain and I am uncertain what I should do next. I am in a ridiculous amount of pain. Simple everyday activities have turned into a chore. Please offer me some advice on what I can do to alleviate my pain.