Your acute back pain is likely to disappear on its own whithin a few weeks.
Yet it is important to remain active, as complete bed rest wouldn't necessarily have a good influence on your pain.
Movement has an antalgic effect, but maybe not every kind of motion is recommended. Why not ask your physio? In the meantime, you may want to find here, a selection of fairly simple exercises, that may be beneficial.
https://www.csp.org.uk/system/files/7_back_pain.pdf