So my bf and I got it on this morning in the shower, no big deal, usual stuff. But he had to run out the door to work since we took a little long - lol anyways, he texted me when he got to work freaking out about marking today's sex and keeping track because he doesn't know if he came or not... like there's a possibility he didn't but he said he didn't see any cum on my back after he pulled out. He told me he's 95% sure I'm fine and 5% he's freaking out. I'm supposed to get my period in a week and never have taken plan b. Should i? Advice??