A question about your blinking problem first - is it noticeable by others?
If it is noticeable have you wondered to ask what people think is happening, maybe ask someone you know.
It could be a opener to ask a HB to see what is caught in your eye thats making you blink
The fidgiting is AA and is what happens to me but will lessen the more you approach, alternatively like Katta124 says do something with your hands.
Snap fingers, practice coin manipulation or massage your hands deliberately working each finger in turn. Again these things can work for you to DHV, you can say your practicing for your lil sis`s birthday magic show or show her your hand massage - good kino? There are vids and books you can read up on for magic and massage, simple yet distracting with a bit of mystery to what you are doing.
J1f