Confused please help?????

Okay so I had my IUD removed on 10/11/15 
I was spotting. Started af next day 10/12/15 lasted 12 days. 
Af 11/18/15-11/21/15
Af 12/17/15-12/21/15
I believe I ovulated on 1/2/16
Glow predict Af 1/20/16
I use 3 other apps that are predicting 1/14/16
For Af to show.
My question:
When should I test? 
Should I wait until 1/20/16???