Thanks for posting your query,
From description , it seems you might developed muscular or ligamentous strain over back .
I would suggest getting this evaluated by an orthopedician for an accurate diagnosis and appropriate management. You may get the MRI
of the area affected under his/her guidance.
Meanwhile following measures will help with the pain
• Lie on a hard bed.
• Anti -inflammatory drugs like Tablet Motrin
1 tablet as and when required
• Avoid forward bending.
• Avoid strenuous activity & lifting heavy weights.
• Apply diclofenac
gel on the affected area. Warm compresses will also help.
Do not lift weight or try to do exercise that involve painful muscles. Give proper time for the injury
I hope this information has been both informative and helpful
You can consult me again directly through my profile http://www.healthcaremagic.com/doctors/dr-saurabh-gupta/64132
Dr Saurabh Gupta.