Hi Corazon, Sorry for the delay.
If you have synced your contacts before then you can recover it.
Please try the below steps:
Open Settings >> Account and Backup >> Backup and restore >> Restore data >> Select Contacts to restore it >> Click on "Restore Now " to save the backed up contacts to your Samsung phone.
Thanks for providing more details.
As you have posted pictures on the Galaxy Gallery it should be present there. Please make sure you have an active and strong internet connection and wait for some time to get the picture uploaded.
I hope it will help you.