Scheduled 10 hours apart on the same day?

Can someone give me some insight on if this is allowed or if I will be paid OT? I get off at 2:30 AM on Monday, we are doing overnights. I have to be back to work at 12:30 pm again on Monday for a regular shift. I know there has to be a minimum of 10 hours between shifts but I was under the impression that you couldn't be scheduled twice in one day and that if you were, the second shift would be OT since it is on the same date?