Could my eye pain (sharp, stabbing pain in one fixed point above my cornea) have something to do with my use of contacts?

Yes, but... ANY case, you need to seek medical care. Migraine headaches, foreign bodies & Herpes Virus are among the possible causes of your symptoms. Also, contact lens wearers are more susceptible to ocular infections and corneal abrasions than non-wearers. If you can't get in to see your eye care specialist promptly, you should go to an urgent care center or emergency department. Please!