Lt. Dan, STOP LIFTING.
DO NOT LIFT ANOTHER WEIGHT.
Now that I've got your attention, you need to educate yourself before you lift another weight. "Lifting a weight over your head" is not only gonna do JACK for your muscle mass, it's gonna get you hurt.
When it comes to lifting, the first rule is to always practice proper form. If you're not, you're wasting your time...you may as well be eating Krispy Kremes on the couch. First, go out and get a book, or better yet, join the Fitness Forum @ Menshealth.com. It's a great place for the beginner...I've been around there for a while now.
Also, check out
www.twowiresthin.com
it's an AMAZING site. Learn proper form, it's lame to get hurt...and then, when you know what you're doing, back to the weights