Getting pregnant after Mirena removal

kristi
I had the Mirerna for 4.5 years removed on 12/13. Have yet to have a period. Actually never had any type of bleeding after removal. I started taking prenatal and testing for ovulation at the same time. I never had a period on Mirena so seems like I'm starting fresh. I tested positive for ovulation on 1/4. But kind of lost on figuring when I should take a pregnancy test or expect my period. Any advice would be great!