help! when is it effective?

(sorry it's another birth control thread. sounds like people need some more questions answered before they leave the office, eh?) [posted here and in women's issues, thanks]
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i've been on BC pills for a month today. (desogen) i've posted questions about it before, and have gotten some great advice on these forums.

so now i'm seeking some founded information, cause the website for my pill is rediculously lacking.

am i protected? we had a bit of an 'accident' today with a condom, and i don't know what to make of it. it's been a month... how long does it take for the pills to take effect?

i've heard anything from 2weeks to 2 months. my doctor kind of glossed over that cause i wasn't expecting to use them as Birth control when i got the prescription.

i guess if i dont get an ansewr here i can call in to a reference nurse or something... i'm just lookin' for a little peace of mind.

thanks

 

I believe it's effective after a week if you start taking them the first day of your period. But if you did the "sunday start", then it's effective after a month. I'd still call your doctor today though, just to be sure.