Can you get pregnant if a little bit of sperm is dripping outside the vagina?

Yes you can get pregnant because that meant the sperm went inside of your vagina for it to be dripping out. It takes only a little bit of sperm to get a girl pregnant.

Net time let him wear a condom or start taking birth control.

If the sperm drips from the penis and lands outside of the vagina, it would take an event close to a miracle to get pregnant. That being said, miracles can happen so why take the chance. Use protected sex!