Need Help, Paranoid af

My gf (23) and I (23) did unprotected sex (stupid i know, and we wont do it again) at day 6 (menstrual flow ended 2 days ago) of her irregular cycle (30 days), but i pulled out, not at the last minute, but way before the orgasm as I had to stroke it before ejaculating outside.

Its been more than 24 hours now, should I be worried of a highly likely pregnancy? Should I encourage her to get plan B?

Thanks for understanding everyone.