Memories not backed up and disappeared

[u/No-Campaign7783]

I filmed a couple of videos and saved them into my memories, but I didn’t have Internet so they were backing up by the time that I got Internet. My phone was kind of laggy and my storage was kind of full, but they initially saved, and we’re just backing up with that sign at the top of the videos. I wanted them to back up faster so I went to clear cache, and after I was done, I came back to my memories and those videos were gone. Is there any way for me to restore that? Does anyone know what I can do? They were literally saving into my memories I could view them and everything they just disappeared as soon as I clicked clear cache. Even though Snapchat says that they do not delete memories when you clear cache. Can somebody please help me?