On October 19th my girlfriend and I were having sex, with a condom with Spermicidal lube – but I didn't ejaculate.
Decided to try again, but with some miscommunication, we briefly penetrated without protection (less than a minute). I put on a condom, but didn't ejaculate again.
The next morning, less than 12 hours later, we took Plan B.
She's due for her period November 7th – is there cause for concern?