Protected sex with a condom, no tears, and no ejaculation. what are my chances of pregnancy? should i take plan b?

Very low. You decide: When used correctly, condoms prevent pregnancy nearly 100% of the time. The chances of becoming pregnant while using a condom and there was not an ejaculation event are vitrtually zero, but they are not zero. Plan b is a hormonal analogue that prevents ovulation for emergency contraception, and your decision to take it should be discussed with your doctor.

Up to you: But chances of pregnancy are very, very low. Plan b has can have generally milld side effects - and in my estimation, your risk from those potential side effects outweighs the risks of possible pregnancy. In the end, it's your choice, but please don't start using Plan B after each intercourse for the rest of your life.