I was going to say that isn’t the issue because I moved my data to a separate drive. But, I just checked and you’re right, my /home partition is full. I’ll have to see how that could happen.
I forgot about all the hidden files. Just my .thunderbird directory takes up 12GB.
Luckily I have another drive I’m going to combine all my data on. And then move the /home directory to it’s own drive.
I read that I just need to change my fstab file to the new home location.
I just wanted to update this and say thanks again to @megavolt . I didn’t move my home directory yet. I just increased the size and tested that I could log back in. And I could. So, a full home directory was the issue.