This treatment is being suggested on bases of the information provided. However I would like to examine & investigate you  in detail. -Control  Hypertension, Diabetes or  metabolic disorder, if there is any.  -Any way it may be tried, --. Dolokind Plus (Mankind) [Aceclofenac100 mg +Paracetamol 350 mg] 1 tab. OD & SOS. X 5 days. --. Caldikind plus  (Mankind) 1 tab OD x 10 days. -(You may need help of your local doctor to get these medicines.) --. Fomentation with warm water. Let the part not be exposed to cold. --. Sleep on a hard bed with soft bedding. --. Use no pillow under the head. --. Avoid painful acts & activities. -- .Do perineal exercises.   --.(Take help of physiotherapist or you can visit my you tube channel Dr NC Gupta.)   & see  me and my yoga; & yoga simplified. --Do not ignore, let it not become beginning of a major problem. --Do ask for a detailed treatment plan. Kindly make sure, there is no allergy to any of these medicines. --For emergency treatment visit nearest hospital. --Wish you a quick recovery & good health. --I hope, I have solved your problem to your satisfaction.   Dr N C Gupta MS (ortho) DMC 3624

Any pain after trauma(fall from stairs in your case) with difficulty in doing routine activities should be evaluated, just to rule out if any bony injuries are there. So I would suggest for an xray to be done In the meantime avoid bending forward, lifting weights, sudden jerk or twist. If the pain is near the tail bone- avoid sitting on hard surfaces, prolonged sitting .

There is chance for coccyx fracture .Do x ray coccyx lateral view .mean while use coccyx pillow and analgesics

Mostly it's a iliolumbar sprain but u can get an xray to rule out xray

Chance of fracture is there

Yes, better to get xray for safety

Yes. U should get a X-ray done of the affected / painful area.