Please Help Me

Before you judge me... I know it was stupid and ignorant to do but it happened and it is what is it. So, on friday i didn’t know i was ovulating (33%) and i had sex with a guy (someone that i have known for years and trust very well) and we didn’t use anything. Mind you, i just got off birth control probably a month ago. Well he did not bust in me however i took Plan B anyways a couple hours after. What is your opinion? do you think i have a good chance of being pregnant or do you think i’ll be okay. I’m super nervous and hate myself for this but it happened and i can’t dwell on it. be HONEST. Thank you!!!