Photo deleted all my pictures, how can i get them back and stop this from happening again?

I imported all my photos into the photo app on my mac so that i could delete them off my phone to get more storage space on my iPhone. After I finished importing i disconnected my phone then deleted most of my photos. I just went into the photo app and all the the pictures except the ones i deleted from my phone are gone, i can't find them in the recently deleted tab or any of the other tabs. Please help i had a lot of good pictures and I'm freaking out. Why would it do that? My phone wasn't even still connected to my computer ahh

Move to Canada

Make a backup. See the 1st link below.

If the photos came from a camera, the photos may still be on the camera card. Otherwise, you can try PhotoRec, 2nd link below.

Again, remember that if you don't value your stuff enough to make a backup, why whine? Easy come, easy go.

A guy at the apple store put all my pictures in this thing called icloud. He did not give me any education on it and i'm not computer literate " (my most important pictures that can never be replaced. I was told they will be stored in the cloud. I was never told the cloud is a evil thing that steals your photos I even paid for more storage and and their gone llllllllllllllllllllllllllll I really need to get them back but i don't know how.