queasy

adjective. feeling uneasy, uncomfortable, or nervous

"Although the Patriots won the AFC divisional playoff game this weekend, the Ravens certainly had made them very queasy"
"I feel queasy about giving a speech in front of a large class"
There is a book called "Queasy Guide to Microsoft surface". "Don't feel queasy about this -- it is quick and easy (QUEASY)!"

http://www.vocabulary.com/dictionary/queasy