Yes if it burst and yes if it leaked.
Not unless you had no barrier when you ejaculated into her. If you had the condom on and ejaculated into the condom while you were inside of her, then exited her and changed condoms (unless the condom broke) you could not get her pregnant. The only way for her to get pregnant is if you ejaculated into her or emptied your fluids into her (and most condoms have spermicide). If neither are the case, it is nearly 0% chance that she could get pregnant.
yes
there could be a possibility but it is very much rare to get her pregnant.
yes.
Yes, if the ejaculatory fluids came in contact with your vagina you can get pregnant.
Yes.
yes
Taking birth control is the key here. As long as you have not missed taking any of the BCP you are 99.5% protected from pregnancy.
The protection level using a condom is about 86% ... meaning there is a 14% possibility of the condom failing, rupturing or tearing.
Yes, that's how pregnancy usually starts.
If you want to prevent pregnancy and the possibility of STDs, you don't! He is being responsible for you and himself by always using a condom.
Yes If he enters at all there is always a possibility that you can get pregnant wear a condom!