Help???

Lizzie • Due in July 2019 with our rainbow after a loss on 6-28-18. Blessed with a 2.5 year old, 7 year old and 13 year old. All boys

Does anyone else get completely negative OPK’s and then still end up ovulating on time? It is CD 10 and my fertile window should start on Monday, I am only testing so early because although I had a normal cycle on my iud I don’t know if removing it last month is going to mess it up, I tested today and don’t even have a faint test line just the control line. I have heard you can have this and still get a rapid surge. Just want to make sure thanks