Suddenly only 10 MB of internal storage?

[IIVisionII]

Hey guys, I was hoping someone might know what's going on. My phone started acting really slow today then gave me a low on memory message all of a sudden. I checked and i only had 10 megs free internal memory for some reason. I've always had 100+ at least. I checked all over, including by using the file find feature and had no big files/pictures. Deleted my texts and emails. That all gave me a few more megs, but didn't go back to normal. I even tried using a backup file from a couple of days ago and it's still like that, so either this has been happening for a while and i didn't notice or backup restore doesn't fix it. Anyone got an idea as to what's going on?

This is a sprint touch pro 2 running energy rom.