Dropped a Pill

When I was taking one of my active ortho tri cyclen pills, I dropped it down the sink. Since I didn't want to skip/be unprotected I took the next day's pill (same color). I read through my pamphlet again and there was no information about what to do if you dropped a pill. 
If this has happened to anyone else u would appreciate hearing their experiences 
Has my protection been compromised and am I at risk for pregnancy? 
What should I do once I get to the placebo week?