What Could Be Done If The Contraceptive Pill Is Delayed By 6 Hours?

I was back on my pill yesterday, so I was meant to take my first pill of the packet yesterday at 7pm. I have been on the pill years and never forgot... but I was away from home and the pill was at home... so i did not get to take the pill until 1am... so i'm 6 hours late. What do i do now?