Pill-3 hours later

How exact do you need to be on the time you take the combo pill? I typically only have a 20 min window every morning between 2 alarms...today I fell asleep after my alarm with out taking it. Just woke & took it 3 hours later than when I take it every day....I've been on it for years, but I dont take them late often, so wanting to make sure I'd be okay to have sex this weekend still