HELP ME PLEASE!

SASHA • Mom of 2 boys! 💙👶🏽 KAYDEN & KARTER 👶🏽💙 9/21 & 1/19
App said I would be ovulating on the 20th of this month but I took a test and it was negative but getting close to looking like a positive. I took another test later on today and looks darker or a sure positive please help me... Is it a positive? When do I ovulate when it's a positive? I took a ovulation test today and I feels it's a positive and I've been having bad back aches and also raw egg white discharge a lot of it. What do you think? Also when it's a positive when's the best time to baby dance? 
6/21/17