Unprotected Sex After I Forgot to Place BC Patch Back on

Cheyenne
So, at the end of monday(my patch change day) I took my patch off before I showered and forgot to put it back on until the next morning. Now today I had a bit of unprotected sex. No climaxes or anything occurred and he had peed right before.  but I'm not stupid I know there are risks. Should I be worried? I'm usually very safe and this was a spur of the moment for about 15 seconds 
Update: I am on the second week of my patch cycle