Hi! I am A. Stevens here to help with your question.
Unfortunately on Android devices there is not a "Trash" or "Recycle" folder.
Once you have deleted off the device...the only way to recover is if you have a backup.
Have you synced your device recently by chance?
Also there are a few data recovery programs out there that I could link you to...but they are not guaranteed to work.
Much as I expected but it was worth a try.
Would welcome a steer as to possible recovery programs
Android Data Recovery
Those are the instructions and download page.
You can try to use that...but unfortunately there are no guarantees that your data will be recovered.
I had maybe one other suggestion, did you by chance email these photos? If so...you could look in the "outbox" of your email
and they may still be there.
You might check out Dropbox. It will sync your photos on your device to a "cloud" where you can access from anywhere on the internet. This way if you accidentally delete anything in the future there will be a copy on Dropbox.
Just a suggestion.
Please let me know if I have answered your question. If you feel satisfied with your answer, I would greatly appreciate if you could rate my service with the smiley faces below. If you have any additional questions please don't hesitate to ask.