im glad that ur happy about the outcome my friend who is 15 just had the baby of some ass-hole who constantly cheats on her. she was all for getting a shmishmorshon but he freaked out and started hitting her, im really glad you don't have to go through that sort of bullshit.
Bringing children in this world is the most irresponsible thing one can do ... when 15000(!!!) of them die every day(!!!) due to starvation ... That's not an argument for not having sex, just the opposite ... enjoy life and have sex ... just be careful, and have an abortion if one must ... No more children to suffer on this world that the most intelligent species on this planet, that is, we humans seem not to even know the answer of 1+1 ....
As to the pregnancy thing, for women with a fairly regular 28 day cycle, ovulation generally occurs around day 14 (day 1 is the first day of your period). You should definitely not let guys cum in your vagina from days 10-18. Outside of that window, you are pretty safe if a guy squirts his load in there. Also, the amount of women who get pregnant from a little pre-cum is very very small.