Yes-  it happend to both of my boys between the age of 2-4.  My Dr. said it was due to low blood sugar.  Can happen easily to toddlers, and kids with CAH it is more common.  My oldest I could  barely rouse and he was very sweaty all over.  He recoverd fine, iwthin a couple hours.   Both times my kids had beeen a bit ill the day before and did not eat much.  Now if they are sick at all I wake in the middle of the night give a dose and a drink of something sweet,  ie. juice .

Make sure you contact your Dr.

 

Good luck.