every once i a while, like every few weeks (or sometimes a few times a week) i get a very intense burning pain in my left lower side that spreads to my lower back and even under my tummy on the left side. it hurts so bad, but only for like a minute or two and goes away. it shows up randomly, whether i'm laying down watching tv, while i'm sleeping, or walking, etc. there seems to be no correlation between the pains and what i eat or what i did that day. it's completely random. it's definitely not period cramps, i know the difference lol. i'm in my twenties and have never been pregnant or had any health problems. this has been going on for like two or three years, i've gone to the doctor for it but they never know what it is and i don't have health insurance to go to a better one. anyone ever had this? or know what it could be?