My question involves criminal law for the state of: Pennsylania

So I'm 20 and last night I was at my friends 21st birthday party, we basically watched movies all night until about 4am, then we had some champagne to celebrate I had 2 regular champagne glasses full of it. Then I decided that I would walk home immediately after, I was tired and needed to get to sleep. On the back to my house (which is only 2 blocks away from my friend's house) I was stopped by an officer. He took my ID and made me take a breathalyzer test, I registered at .8! I think it's because I had just drank that it made it register so high. He put me in the squad car and drove me home, notified my parents, and said I'd recieve a citation in the mail. Is there anything I can do? What penalties will I be facing? Will this effect me joining the air guard in any way? Thanks.