[Harmony♥]

If you skip a pill, taking it the next day isn't going to increase it's effectiveness. If you skip a pill, ignore it and move on to the next one as you should: at the same time every day.

Going to a doctor may give you a better idea, however, conception takes the same amount of time anywhere. In order to take a pregnancy test, it was to be 2+ weeks since the incident occurred. If it's been this long already, you could take a test and it should give you an accurate result when taken correctly. Or, you could wait until you're meant to have your next period and take a test from there OR you could visit with your doctor to have a blood or urine test done there.