Does anyone else silently cry in class??

Any time I go to class, I start silently crying even though nothing is wrong, and then I just feel miserable. It doesn’t matter what class it is. This happens for every single class without fail. Has anyone else experienced this? Like, I don’t sniffle or anything. It is so exhausting and I just feel miserable and embarrassed. I worry people see it because I sit in the front of class. I start feeling terrible out of nowhere and the tears just start flowing. It started happening again during my night class today and it lasted for 2 hours. It stops happening when I leave the classroom. It doesn’t matter what building I’m in.

Nobody has ever said anything about it, so I’m thinking it either isn’t noticeable or it is common. Do you cry during class?