I was fooling around with my boyfriend 3 days ago, and his penis partially entered me a couple times but never for long and only just a little above the tip. He never ejaculated, and we wiped the precum off every few minutes while this was happening. He had last ejaculated 12 hours before the incident and had peed since then. It is around 86 hours after the incident now, and last night (third sleep after incident) I noticed light spotting that, when I put a tampon in for an hour or so, came out with brown sticky discharge like stuff on it. I was also gasy last night. Should I take plan b even though it’s only 25% effective at this point? Is there a good chance I’m pregnant?