It's normal for the ear to be a little oozy- I don't think that necessarily means it is infected. If it gets really sore and becomes very red I would get a dr. to look at it. Doesn't sound like it is right now - so I wouldn't worry about it unless it does.
I would go back to the place that did your piercing and see if they can help you get your original post back in the right hole. You shouldn't have to take the earring out to clean it. Cleaning it with hydrogen peroxide and the antibiotic ointment and turning them several times a day should help it heal properly.
Getting your ears pierced is no big deal. What does your Mom say?