Hi I have been suffering from intense back  pain for 3 days, the pain is situated on the left side around the middle of the back, spreading around my tummy, I have not suffered from any urinary infection, however other limbs are aching& I feel off colour.
Intense left side pain in the middle of back could be due to renal or ureteric calculus. I would suggest you get a USG whole abdomen done. Meanwhile, you can Injection spasmoproxyvon I'm with Tab Tuscan plus twice or thrice a day, which will relieve your pain. Just get a physicians' opinion.