I am having pain starting in my left groin area and finally leaves to my back. It is making me sick from the throbbing pain. I threw up everything I had in my stomach. I kept throwing up and could not think of taking a pain reliever. Finally, after throwing up till my muscles in my rib section hurt, I took a Tylenol 625 and it finally helped take the pain away. It came back a few hours later, and I quickly took another Tylenol and went to bed. I woke up about 7 AM feeling no pain, but as soon as I went to urinate I got the pain back to my back. Not in the groin area. I took another Tylenol and didn t have any pain until this evening at 7:00PM. Took another Tylenol to get rid of the pain in hopes not to get nauseated all over again. Do you think this could be me passing a Kidney stone? I had chills and also got waves of flushing feelings. I was told some years ago that I had a very small kidney stone, when I fell and hurt my side, they took a mri with some liquid stuff. I am now 68 years old, and have never had such pain. The only way to describe it is like having labor pains since it throbbed just like them. I have been drinking cranberry juice and lots of water, to see if it helps clear up my kidney, if it is a stone trying to pass. Please let me know if it is what I think it is?