HELP!

My boyfriend fully finished while inside of me he knows how paranoid i am about getting pregnant again so now im worried. I take my nuva ring out in two days and i normaly start my period about 4 or 5 days after how likely is it that ill get pregnant i normaly dont have sex a week before i take it out just so if i dont start my period i know there's a chance i could be. Ive been in nuva ring for 7 years with no problems but i still get worried