WandaVision's chronology makes no sense

So, I have a big, blow your mind, question mark about the WandaVision show.

Need I say Spoiler Alert?

Spoiler about the show WandaVision, obviously, and also about Avengers: Infinity War and Avengers: End game. Now, if you haven't see the movies yet, I mean, come on, really? Did you know that is not good to lie?

So, I was remembering somethings about Infinity War and the new show WandaVsion, and it got me. 

In the episode four we saw that Monica, the daughter of Captain Marvel's friend, had just returned from the blip, and the people coming back from the blip was still on the news when she tried to go back to work and had her mother's replacement tell her that she needed to go help the FBI in New Jersey. They were trying to figure out why people were missing from a town that nobody seemed to remember ever existing. This town is actually the town where Wanda is living with Vision.

The theory is that Wanda created this town, this life, so that she could somehow escape grief, and live with the love of her life forever. 

But, problem is, at the end of Infinity War, right after Groot blips, Wand blips too, she was over Vision's body, morning him, when she was turned into ashes, along with half of all living creatures on earth, thanks to Thanos.

When the crew managed to get everyone back, it took just seconds before Thanos hit then again, and a few minutes before all the heroes showed up to help in the fight.

So, question is, where did Wand had time to, first think, then put the plan into action? Imagining that she was able to get it all right at the first attempt. 

So, instead of being confused and everything, she did it all the second she came back? 

That seems very unlikely, even more so than a talking tree, or a racoon...

Now you can say that she did it all after the fight in Endgame, but don't forget what I said at the beginning. Monica, Captain Marvel's friend's daughter, had just come back from the blip, and was ordered to go help the FBI at New Jersey, with the ongoing case of the missing people from a town that, apparently, does not exist.

That's not just me saying, that is what we all saw on the episode four of WandaVision.