Question about an under age drinking incident (PA)?

now usually I'm not this dumb at all (and i am 19 so is all of my friends) but this morning i was with a few friends one of them was throwing up from drinking from the night before so we pulled over into McDonalds to get him food and he got out of the car took off the shirt and sat half naked in the car while we all went in to get food... right when we got it we saw a lady look into the car and see him and the cops came.... they breathalyzed him and he came out as 0.18 , and his grandma picked him up and the one who was driving BAC level was 0.1 and my BAC level was 0.05 i understand how stupid this was but what do you think the outcome for me would be????... like i was not driving i was not stupid drunk.. i cooperated with cops... and they let my one friend who wasn't drinking drive me and my friend who came up clean on the breathalyzer test drive home