Unsure ?

Okay..so I'm new to this whole TTC thing..I didn't "try" with my first son. It just happend. He is about to be 7 and I've had an iud Mirena since he was born. I just had it removed 2/22/15 and I started my period 2/27/15-3/6/15 from my glow calender it says when I should've ovulated but by taking the actual test,none have come out positive. I also never had a period the entire time I had my iud. Which was from 2008-2015. anyone with any insight or any advice or who have gone through this please tell me your experiences. And if there is something I may need to do or just give it some time to get back on track? Thank you!!