No, it takes about two weeks after sex to show up on a preg test-- for most women.
Did you miss pills? I'm not sure what your situation was concerning accidents and not being good with remembering your pills, but if you're in a situation where you need a backup method, that method needs to be used for an entire week of perfect pill usage-- not just the day after.
Set an alarm on your phone or figure something else out because that pill NEEDS to be taken correctly to work as it should.
Continue with your pills until you find out whether or not your pregnant. Irregular periods can happen when you're new to birth control