absolutely lost

Renee
So far I have six apps on my phone. Three of them say I ovulated on the 21st one of them says i ovulated on the 19th and two of them say I ovulated on the 20th. 
As far as aunt flow what of them says I will start on the fourth two of them says I will start on the fifth three of them says I will start on the six. I just hope aunt Flo doesn't start and I am preggers. Trying to think positive but keep getting lost LOL