Intense achey pain starts lower back & spreads to stomach, causes chills, nausea, severe pain... then goes away. reoccurrent?

What Have You Eaten?: This doesn't sound too enticing. Wouldn't be fun to have on a first date. If you just had it for one day, two at the most and it went away, fine. but if you keep having this, could be something to worry a little about and best see a doctor to sort it out. Many potential causes. In the meantime, make sure to keep up with fluid intake-don't get dehydrated. Fever? Take that seriously.