I'm on Tri-Previfem HBC. I missed a pill on the last week of my active pack (3rd week), and took two at once the moment I noticed. I started bleeding a little brown discharge during this time, which lasted until my normal 'period' started a few days later, at the end of the active pills. After the requisite withdrawal bleed week I started my new pack, and am on pill #2 today. I'll be seeing my boyfriend tomorrow and of course am hoping to have sex, but I'm worried that I'm not completely protected. I know that missing one pill (and taking two at once the next day) is usually considered more or less alright - my pamphlet that comes with the HBC says that backup BC is only recommended if you miss two or more pills - but I'm getting conflicting information online and I trust this community a lot, so any advice would be appreciated.