Hi!

I've had the similar experience just in 2 first weeks and I've heard lots of people saying the same thing. I went to my doc and he told me this was caused by rapid weight loss and toxins flushed out of my body. For instance, the uric acid is highly increased when a person loses weight. He told me to drink even more water - 3 liters/day - which I did. The pain lasted only 3 days and since then I'm fine. Your body is adjusting to this WOE and I hope you'll feel better soon, but in case you don't - see your doc!
Best of luck!
Alina