Pregnancy and using the nuvaring

I am trying to conceive but im trying to wait about two more months to actually get pregnant but recently i had the mirena for almost two years and last week and had it removed and switched rhat same day to nuvaring after two days of having the nuvaring my period came i didnt had a period since november of 2014 so it was pretty heavy but now that is gone i want to have intercourse with my husband but im scared to get pregnant and have my nuvaring should i just take off or take an alternate birth control or it should work by itself