Best Ovulation Kits

Sharyn
Hi! Can yall tell me which kits so far have given you the best results? Or most accurate I guess? My husband and I conceived our daughter on the first try... Not even trying really, just seeing if anything would happen. I was on mirena a for just about 14 months and now we are ready to try again. I had it removed in January of this year. It took a month for my cycle to start again with AF, and it's been consistent since. During my May ovulation cycle we BD accordingly, and nothing! It really has me bummed. With our daughter though, I was not on any birth control before having her for quiet a few years. So I'm wondering if the mirena has something to do with it. 
Thanks for any advice!
Thanks