I had unprotected sex with pull out ejaculation as a virgin, 2 times that day with 3 hours apart. i have never been on birth control. and we took a shower in between clean our parts. but i was also ovulating, and i took plan b 24 hours later?

Plan B may work on top of withdrawal method but not 100% because both methods are not foolproof. So if you miss your period more than 5 days later this month then do a urine pregnancy test with an early morning urine sample for ruling out pregnancy. You should use contraceptive method if pregnancy is not preferred and/or your partner should use condom for both safe sex and conception avoidance.