What Are The Uses And Side Effects Of Novelon Tablets?

Hey, I'm going to start using novelon for the first time. My period started on Thursday night, but mistakenly, I took the pill marked 'monday' and that too only at about 11 am on Friday morning (because I woke up to see that I had gotten my period). What should I do now- do I need to take pills marked for thursday and friday, or does the day marked not matter?
I am 20 years old, weigh about 136 pounds (62 kg) and am 5 feet 6 inches tall, with no serious medical history.
Thanks!