help please, i’m terrified

i hooked up with a guy for the first time, and while we here having sex he looked at me and was like “i just came inside of you”. i flipped out because i had no idea he was going to and he made no effort to pull out whatsoever. as soon as i got home, i took two of my birth control pills and then the next morning, i took a plan b, because i hadn’t been taking my birth control regularly (i took them every day, just some days i would take them late by at most 3 hours). it’s been about 4 days since, and i started my placebo pills 3 days ago so i’m just waiting for my period to start. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> predicts my period will be here in 2 days. is there any chance i could be pregnant or am i just being paranoid??