Every pill is different and reacts differently with your body.
Your body usually needs at least 3 months to fully adjust to the pill and get into some sort of routine.
You're technically only 5 days late, which really isn't anything to panic yourself over yet.
Sometimes you can completely skip a period, the same way your period can sometimes start when you're in the middle of a pill packet.
I've never taken the pill you are currently on, but if it gets to Sunday and you still haven't come on, as far as I am aware, you should start your next packet still as normal.
If you are unsure though, your best bet is to phone your doctor and just ask explain that you've not had a period at all yet this month and ask if you should still start your next pack?
When I was on Microgynon 30 I phoned my doctor to see if I could take 3 pill packets in a row without a break, or would it cause me harm? She told me that it was fine (which I didn't expect), just you shouldn't do it too often.
You can be pretty flexible with the pill, but don't panic yourself too much over this! Obviously if you don't have a period again next month, I'd probably advise going to see your doctor and discussing a new form of contraceptive, even if it's just a different pill.
In nearly 6 years I've been prescribed several different pills, some of which were Microgynon30, Yasmin and Millinette.
They all have different levels of two female hormones called Oestrogen and a Progestogen.
Your body will react differently depending on what level your pill contains, this will effect your moods etc as well.
If you still feel concerned, then as I said previously, phone your doctor for a chat or book an appointment.