I wouldn't recommend unprotected at any time even if on b/c because it does NOT protect you from HIV/AIDS or any STD. Nor is it 100% effective at preventing pregnancy even if taken perfectly as directed. I am living proof of that. And so is my little brother. My mother was and still is a perfect medication user. Never late forgotten etc but 2 times she got pregnant while on the pill.
However I cannot say this and preach to you how you should always use backup but I have to say I am not using backup faithfully. I try to but since I use the pill I am "safe" that will eventually bite me in the behind but it's my choice.
People say something like 1-2 weeks and you're protected (I think) but wait ATLEAST a month.
Do you have unprotected sex on the pill? And if yes
Then when did you start not using an additional form of contraception?
I've had an awesome time. Started it in august 2010 after a pregnancy scare. Normally I am very sensitive to hormones medications etc. So I was worried I'd be very sick. I had the usual issues they warn about for the first 3 months. Which btw are pregnancy like for some. After the 3 months adjustment period I feel normal again.