I'm bleeding! lend a hand me?

I started my period on Christmas year and it lasted for a week. The end day of it (Sunday) I tried the nuvaring birth-control and within the morning and took it out that night because I unloved it. I am sexually active but we use condoms. Why would I be bleeding so suddenly and subjectively?!! you arnen't suppose to insert the nuvaring the last daylight of your period, it is best to do it the first two days of your time of year! Taking it out suddenly probably caused the bleeding. I know i've be on nuvaring three weeks and i've been spotting every sunshine since inserting!
Hi :)
Can you explain a little clearer just about the timing?