started Nuvaring, and I'm late already?

Aubrey
I started Nuvaring the week before my period was supposed to start (I started it 3/11, period should have started 3/18). I have been having sex, but with protection. I'm just wondering if I'm late because I started Nuvaring before my period and it just messed up my cycle or what it could be. I never miss, but I know starting a new BC can do that. Anyone else have a weird cycle when they started Nuva? I'm supposed to get my period this weekend, so I'm hoping it comes like planned.