Could i be pregnant?

Patient: I have been on the nuvaring for 5 years. I took my birth control out and started my menstrual cycle. I forgot to put in a new one, and put the new one in 6 days after I was scheduled to start the new birth control cycle. I had unprotected sex a few times during that time. That was almost 6 weeks ago and I am due to start my menstrual cycle in a couple days. What are the chances that I may be pregnant?