use of condoms

today me and my gurlfriend were gonna have sex.so i got hard and she just sucked me off for like litterly 5 secs. then I got the condom out. i putit the wrong way, and imscared that some precum would have gotten on da condom and when i was having sex it could have made her pregnant. is tis possible? my penis was out in the air for like 10 secs so yeah
is there precum after 5 secs of precum?
thank youu