There could be muscle wasting due to the fracture. This could be the cause of your pain. Please do back strengthening exercises.

Hi At your age, a compression fracture is not usually seen. If you are experiencing low backache again, try the following: *Stop jogging and playing badminton for a few days *Apply hot water bag 10 minutes twice a day *After applying hot water bag, apply Nobel Gel *Tab Flexon (1 tablet after lunch and 1 tablet after dinner for 5 days) (if you are not allergic to it) *Tab Pantakind (1 tablet before breakfast in the morning for 5 days) *Do Bhujangasana (start with 5 counts per day and slowly increase the number of counts till you reach 40 counts per day) *Avoid sitting on a stool/chair for more than 15 minutes at a stretch. After every 15 minutes, get up for 1 minute and then sit back again. *Whenever you sit on a stool/chair sit ahead...you will automatically sit straight. Don't sit back and try to get back support. You will involuntarily bend your spine and increase your back problem. *Avoid sitting on soft sofas. *Avoid riding bike/car for a few days. *Avoid bending forward with your knees straight. Bend your knees and then bend forward.

It may be simple sprain but if pain is increasing consult orthopaedic surgeon

Have you consulted ur doctor since the pain Started? Just take painkillers sos and if still not ok then consult.