today my 9 yr old daughter began feeling dizzy, then fainted on the floor, i got her to the restroom (we were at a restaurant when this happened), she grabbed hold of toilet thinking she was going to vomit but didnt, she kept saying she felt dizzy and fell back to the ground again, she was also pale as a ghost, so i wet a paper towel in cool water, and began wiping her forehead and neck , a nurse that was a customer there, put some sugar under her tongue and had her drink orange juice and about an hour later she was feeling a thousand times better. do you know what could have caused that?