First got them a year ago. I had woken up early one day and just sat in my basement. Out of no where My lower back started hurting. I figured it was from the way I had been sitting so I got up to stretch. No luck. I tried laying on my back so it would be straight to see if it would help any, again no luck. My mom was gone taking my sibilings to school, it was around 9am, so i had to wait till she got home. It ended up just getting worse and worse. I'm usually very laid back and can sit still without moving, well during this time, I was rolling around on the floor because constant movement was the only way to take even a fraction of the pain away. Mom got home and thought I just didn't feel good. Suddenly I just felt nausea hit me. She said she knew when I started vomiting, that I needed to go to the ER. Anyways, They get me there, get pain medicine in my system and nausea medicine because everytime I would just sit up I got sick. My pain was so severe they were giving me 2 to 3 times the dose someone my height/weight should have every 20 to 30 minutes because it was so bad. By now it was 11am and they decided I needed a CT scan. They said the results should be back within 30 minutes. Within 5 minutes they came in and told us. Got prescriptions, went home, slept all day only waking up to take meds. I've had them a few other times, but not as severe as the first.