I'm on Lo-ovral and I take it at 7 pm everyday. On sunday I took it on time as usual, but around midnight I threw up. Only once and not very much at all. I know I'm not pregnant (it was just something I ate), but I have heard that you can throw up your pill and make it ineffective.

Did the pill have time to get into my system properly before I vomited?? Is 5 hours enough? Am I still safe???