Pre seed & accidental pull out HELP!!

Hubby and I used pre seed, we’ve been trying for about 6 months now. Well I took a opk and it was positive so we BD well when he went he leaned forward and his penis came out when he cummed. So it was like he cummed all on the outside instead of inside me and he hurried and put his penis back inside me. Has anyone ever had this happen to them and still get pregnant??