You can take the tank off of the battery, then blow a few times into the drip tip into a paper towel in an attempt to clear the air chamber. Chances are the carto is ruined though if you made the hole too large. You also could have punctured the air tube in the carto when you punched it.
This is exactly why I encourage new tank users to purchase pre-punched cartomizers initially. Those eliminate the human error aspect of punching your own, as you have discovered yourself. Once that you have gotten comfortable with the other aspects of cartotanking, you can give punching your own a trial.
Just a quick question... Did you fill your tank with
juice with the top endcap off of the tank?