First, calm down and make sure that your eyes don't feel any pain. Then you should look at the mirror to see if there are any foreign stuff in your eyes, and really roll your eyes to see if there anything come out of your eyes, sometimes you may not feel irritated yet. After such simple exam, don't worry. As the eyes in dry situation, they will constricted the tiny blood vessels around your eyes. Now, you use some lubricated drops to relax them, it is normal that you will feel itch when the blood circulations recover. Remind you of checking your eye drops production date, if it expired, oh my dear, do not hesitate to see your doctor, he/she can help you.