My mental state just crashed

I haven't gotten out of the house for 2-3 weeks, and I decided to come back to the city to meet up with a friend. I'm still planning to do it, but I don't think I have enough physical nor mental energy to go anywhere today. We planned to go tomorrow, but I wanted to visit my mother in the city for a day and hang out with a friend the next day.

Either way, an hour before getting out of the house, my energy just got sucked out. I don't remember last time I felt so depressed in my life. Everything became useless, and my confidence turned into self hatred. I still decided to go though.

When I have almost reached the bus stop, the bus passed me by, stopped to take one person in, and left. I rushed to it last second, but it started moving before I could do anything. That shit almost made me cry, which is insane because I almost never cry unless I'm in an extremely stressful situation. I don't know why but that broke me. I literally never felt so disappointed in myself for MISSING A FUCKING BUS. I feel worthless, like there's no future FOR NO APPARENT REASON.

This is so confusing to me. It feels like someone humiliated and beat the shit out of me. I'm somewhat back to normal, but I still feel severely depressed. Wouldn't expect this to happen to randomly, but I guess it did. I really hope I have enough energy to go and that this won't happen tomorrow because I made plans with that friend, and I don't want to flip the arrows after I literally promised him to go lol.