Very much possible.no amount of it is too small
Yes, it is possible to have her get pregnant from that. Any time you have unprotected sex, you run the risk of pregnancy. If you wanted to continue to have sex, you should have put on a new condom and then continued.
Yes because the penis still leaks little drips of semen after ejaculating. You probably should of pee first just to get rid of any semen still inside the urethra and then have sex again.
It's a possibility! but more than likely no, but you never know!