Do you usually have sudden emotions?

Monday I was returning home and I slept in the car.When I woke up at home I suddenly start to feel very weird.I was feeling a deep sadness and I didn’t want to speak to anyone.When someone tried to talk to me I was starting to cry with no reason.This lasted for 2 days and I’m not fully ok now I talk but I’m still sad and I want to be alone as much as possible.
Did you ever experienced something like this?Can you give me an explanation to my feelings?How you’d you handle such a situation?