I Am Currently On Nuva Ring. I Was Supposed To

I am currently on Nuva ring. I was supposed to take it out December 25th forgot all about it. So I took it out January 1st. Had unprotective sex a couple of times New Year's Eve thru yesterday. I was wondering if there is any way I could be pregnant. Last night I peed and wiped and noticed that I had blood on the toilet paper that was pinkish in color. It was nothing like period blood. I took a pregnancy test today but it came back negative. So I was wondering if you could help me.