Me and my boyriend had sex about 8 dayz ago... and the condom broke it was just pecum though just for about 30 seconds or less. How long until the effects..? And can something really happen from a condon broke from precum?

<Moved to a thread of it's own>

Yes, pre- contains sperm, therefore, you can become pregnant. Even if only inside for a short amount of time. You will not know either way until you are due for your period... good luck.