Am I Pregnant

my last period was somewhere around January 7. well on January 25th I went to the doctor & started on the nuvaring. (keep in mind thoughout  this whole time, I AM sexually active) well on Feb. 7th, I had sex once & my nuvaring fell out without me knowing, then I had sex again & he wasn't sure he pulled out all the way. so when I got home that night, I realized my nuvaring wasn't there. so the next day I went and took plan B. that SAME day I took plan b, I had sex again & the condom broke. My period is still late but I'm thinking its just because of the nuvaring. you are suppose to keep it in for 3 weeks, then on the 4th week you are suppose too take it out & then have your period. I only had mine in for 2 weeks, but my calendar says I should be on my period. am I Pregnant?