First of all, I know a lot of professors are really strict on attendance, but this professor isn't. At least not in the few months I've had him. He just started working as a professor, he's pretty young, usually the classes are kind of laid back and he's even stopped having us check in for attendance anyway. But I've been late to this class a lot (usually only by a few minutes, but I've been up to 10 minutes late before and he's never said a word and the door has always been open when I got there). 

Yesterday I showed up a little late (only 4 minutes when I got to the door) but two of my classmates were standing outside of the door because it was locked. They tried knocking at first and didn't seem to get the professor's attention, so a professor walking by laughed and used her key to let us in and I assumed that would be it.

But when we got in there, he stopped teaching (he's never just stopped before) and asked if another professor let us in. When we said yes, he asked who, but none of us knew (and also we weren't gonna rat her out?). After that he made some sort of comment about how the door was locked because the class had already started and we weren't on time. Which again felt really weird because he's never a single time cared about people coming in late. He was only going over a powerpoint and half the class wasn't even there. At least we showed up. Before we left he made another passive aggressive comment about being on time for class Friday.

Idk I'm still just feeling really awkward and embarrassed about this, I feel like my mood has been really terrible ever since. The other two students seem to work hard in class so I don't think he just dislikes us. I'm just not sure why he did that out of no where. If I knew he cared so much, I would have tried harder not to be late. I'm just really surprised he locked us out for being 4 minutes late when up until now he's never even closed the door during class.

Now I just feel so terrible, I don't even want to go to class at all. I know I need to though. It already takes a lot of effort for me to get myself to go to class three times a week, and now I'm feeling really humiliated about it even though I personally don't really think I did anything wrong.

I'm probably being sensitive, but it's just been a really hard semester with my mental health and I've been sick since 5 AM this morning. Sorry for rambling, I just really needed to get it off my chest even if it's stupid.

**TL;DR:** My professor called me and some other students out for being late even though he's never cared before now, and I'm still feeling embarrassed about it.