The nuvaring and pregnancy

Jerica • Im a wonderful single mother of 2 beautiful babies, a 5 year old tonka truck son & petite little angel of a daughter who is 7! I'm head over heels for my oilfield trucker. I'm going to school for Medical Assisting & Phlebotomy!
I have the nuvaring, i kept it in the 3 weeks and took it out on the 24th in the morning and had sex that following night/early morning of the 25th. I lost my refill of my nuvaring that im supposed to insert in 6 days, am i susceptible to becoming pregnant? Im nervous.