OHH.
I had that once in the 7th grade. It was horrible.

I couldn't move and it was like cramps!
Luckily, I went to the doctor and he prescibed me some pills.
You need to take 8 pills a day, 4 in the AM and 4 in the PM, for 2 weeks.
After that, I got all better.
Well, first, I took a blood test to see if I was positive for MONO.
and I was..
but now I'm all better!
Feel better!