Back pain after falling. And ointment).

Good Morning Sir /Madam I am Male, My age is 47 yrs, wt 82 kg.. Last sunday  I fell from the small table when I was trying to fix  photograph on wall... I have mild to moderate pain in lower back ( left side) and in hip area (Left side) ... Actually I fall on my back... I am going to office and can do all work normally but during sleep  I get pain in this area while sleeping on back. When I sleep on one side there is no pain but while changing position it hurts. While waking up from Bed and try to sit down I get  pain in this area.... Feeling of stiffness in area... I have taken Akilos P 1-0-1 as advise by local MBBS Dr for 5, days. Also treating area with ice pack 2 times. The pain is little improved but still there....I Walk for around 40 minutes daily after which I think pain gets increased. Can you please suggest  treatment ( Oral and ointment). Regards, Gopesh Shah