EMERGENCY!

Ariel
Me and my boyfriend did the do about three weeks ago. We only did it for thirty seconds, he didn't cum, and I put the Nugaring in the day before. About six days ago, we did the do again but we used a condom and it didn't break. I still had the Nuvaring in. However I took it out four days ago and my period hasn't started. Could I be pregnant? I really need advice.