Severe right-sided back pain that shoots down towards the groin and does not let you sit, walk or lie down is most often a
kidney or ureteric stone - that restless, cannot-find-a-comfortable-position pain is very typical of renal colic. A muscular or disc problem usually eases on lying still, which is not happening here. You need a urine routine and an ultrasound KUB (or NCCT KUB, which is the best test) plus
creatinine, and until then a diclofenac or drotaverine tablet with plenty of water helps. If there is fever with chills, vomiting, blood in urine or you are passing very little urine, go to a hospital emergency now - an infected or blocked kidney cannot wait.
Next Steps
Get urine routine and ultrasound KUB today itself, drink 3 litres of water daily, and consult me on Practo or at Synergy Multispeciality Hospital, Miraj with the report so we can decide between medical expulsion therapy and a urology referral.