Hello and thanks for the query
In my take a complete bed rest
for two days and take some analgesic
and apply analgesic gel locally, don't try to massage
it. If you get relief and the pain reduces than try to go back to your work slowly.
But if their is no relief and your pain increases even after rest than get your X-ray done and consult your doctor for further treatment and investigations.
Complete rest is the best treatment for back pain
Best Wishes and get well soon