Painful flank lump? This be hernia/knot?

So i have been having middle back stiffness, tightness and aching since a month or two. Now there is a particular point near my right back flank, just under the rib which feels tender and if palpated deep enough feels like a lump. I am scared now. I checked kidney palpation videos by doctors on youtube, i did it there's no pain. And also when i press kidney area from front there's no pain. Now, coming to history i have a gallbladder polyp of 2.9mm since 2 years, earlier this February i had done the 3rd ultrasound scan and it remained same in size. I am outside of India and healthcare is nightmare here. Idk how do I manage this. Please help, I am scared. Painkillers don't work as this is not exactly a pain, if i sit on bed and work my back muscles get extremely stiff. Can this be hernia/knot? I am scared about cancer. There's no other symptoms apart from what I mentioned. Please guide me.