I had sex, used condom, he said he pulled out before he came, condom didnt break, was on nuvaring for 7 days & took plan b. pregnancy risk?

Yes, but very low: Fertile couples who have sex always can have a cute surprise baby. That's why it's important to be married, settled down, with stable jobs that provide health insurance (because babies have lots of doctor visits). That said, 1 properly-used contraceptive method is enough. Two reliable methods is more than enough. Two methods plus taking additional hormones like Plan B would be overkill.