Just because it’s the 4th day of your period is no reason to forget any type of protection in the morning. And while it’s certainly true that you’re probably safe for a little while and that you have things at work that can take care of such situations – that will not keep the sudden worry out of your brain when it dawns as you drive to work. And just because your top is down on your convertible – that will not keep you from taking the appropriate “just in case” measures against any possible accidents.
Driving one handed and looking like you don’t have a care in the world will not hide the fact that you’ve unfastened your pants with the other hand so you can shove some tissues into your underwear to ward off any possible issues should a taller vehicle pass next to your roofless car and decide to look in. I’m just sayin’.