TTC after IUD

Katelyn
Hi! 
I'm a 28 YO just starting this whole process. I had my IUD removed last Wednesday (4/12). I haven't had AF for almost 2 years due to my Mirena, so I'm not really sure when my cycle is. 
My partner and I are ridiculously excited about having kids and know we've got lots of trying ahead of us, but I was really curious about my cycle and got the Clearblue Advanced Digital Ovulation Tests. I did the first one the Friday after my IUD was removed (4/14), and got the circle, and then tried again on Saturday and had the flashing smiley (High Fertility). I've had the same flashing smiley since then, even when it's my afternoon urine. I know I just had my IUD out, but I figured if it was negative once, the positives might be real? 
Anyone have experience with these tests and "false positives?"