Hi, I take Apri birth control. I have been on the pill about a year and a half. I was supposed to start my new pack of pills last night (March 14) around 8 p.m., but due to a family emergency I wasn't home so I missed taking it. I woke up at 6:30 this morning (March 15), and took it right away, so basically I was 10 1/2 hours late starting the new pack. I plan on taking it at regular time tonight. Am I protected, or do I need to use back up contraception?