I am guessing nobody answered this question because you are only 16 and they do not want to get in trouble and your issue is already probably resolved.
#1 - You can't get pregnant unless you have sex, or have his semen inside of you somehow. Oral and fingering won't cause pregnancy.
#2 - If you have a yeast infection, there are things that you can do. This site is a great resource.
#3 - You can buy a home pregnancy test kit, it's only a few bucks at the drugstore, or you can buy it online, connecting your bank account with like paypal.