need some opinions please?

hey, this is a repost because i got no response previously :( just wanting some advice please!

Is there anyone who has gotten pregnant from precum?? a pregnancy wouldnt be a problem for my fiancee and i we already have a 2 year old, im just really puzzled.

My period was due last sunday, so a full week ago, my LMP was 12th Nov, so i would expect that i ovulated 25/26th Nov, I dont use any other contraception, (i just been very aware of my dates/ovulation etc its worked so far since having my daughter) anyway he never ever ejaculates in me just in case, and this month was no different, i know precum is only suposed to be impregnating if he goes twice without weeing inbetween, which we did within 3 hours on the 1st dec... so i should have been well and truly past ovulation, but thats the only day it could of been if it has happened...ive had a few cramps and felt like period was coming but it just hasnt!!

I know i need to take a test...i plan on it in the next couple of days if my period doesnt come, but whats everyone opinion on my situation? i just really dont think its possible??

thanks :)