Pregnancy or Switching birth control issue...

I was on the second week of my pill pack and my OBGYN physician suggested I switch to the nuvaring; she said it was okay to put it in that day- so I did.

Fast forward to today, my period is three days late ( like clockwork I should’ve started on Wednesday). I’ve had cramping and sore/ heavy boobs and a little nausea. This past weekend I had a light pink discharge.

Could I be pregnant orrrrrr did the nuvaring in the middle of a pill pack mess me up?! I think it’s odd that I would have period symptoms and no blood.

Yes we have sex without condoms and we don’t use the pullout method.