Hello Opujhum,
Thanks for using the Apple Support Communities. It sounds as though you were importing photos from your iPhone to your computer or Mac. Are you using iCloud Photo Library on your iPhone or do you have a recent backup of your iPhone? If so, you may have some options to recover.
First, look in album Recently Deleted in Photos app > Albums > Recently Deleted to see if the photos are showing there. You can review information about the Recently Deleted album in article, Delete photos on your iPhone, iPad, and iPod touch section: Get your photos back.
If you're not using iCloud for Photos, it's possible your photos could be contained in a backup. To check your last iCloud backup date, go to Settings > Your Name > iCloud > Manage Storage > Backups > Last Backup. If you need to review backups created on a computer or Mac, check out article, Locate backups of your iPhone, iPad, and iPod touch for details. If you have a backup available for the dates the photos would have been stored on your iPhone, you may be able to recover your photos by restoring your backup. Restore your iPhone, iPad, or iPod touch from a backup
We hope this information is helpful.
Best wishes.