Ovulation Issues

Ok mommas I need some help. I had my Mirena IUD removed back in October. We have been very diligent about having sex around my ovulation time according to my calendar. I started taking ovulation tests this last time around and I have continued to get a negative even though according to my Glow calendar I should ovulated on January 13th. Has anyone experienced issues with ovulating after having your IUD removed? I wish I would just accidentally get pregnant like we did with the first baby. This is so much harder and makes me really understand how some of you feel struggling.