The other night, I woke up in the middle of the night with a stabbing pain in my left side, right towards the mid-bottom of my rib cage, but it was coming from behind my ribs. I didn't pay it much mind, considering it was like 3 am, I was exhausted, and just wanted to go back to sleep. So, I popped a couple ibuprofen, laid back down, and went back to bed.