As others have observed, getting them in will come with practice. When I first stated wearing contacts in H.S, it was a 30 minute ordeal. Now, its about two minutes, most of that washing the hands and letting them air dry before putting the lenses in. It will take some time to adapt to contacts, and to retrain the eye muscles to focus correctly. Unless you've got them in backwards, or in the wrong eye.

When I go for long periods of just glasses, then back to contacts, I step up the wear periods daily. Four hours at first, then six, then eight, etc... If the blurryness/headaches continue, see the eye doc you got them from. He/She should have given you a trail pair in your prescription if they were in stock (mine are, and I have a strong prescription).
"I've worn them close to twenty years, and the only reason I haven't gone the lasik route is because the contacts are so cheap and easy for me."
Same here, 20+ years of contacts. Only I've not done the Lasik thing 'cause if the procedure is botched, they eyes CANNOT be replaced. Yet.
