My emotional roller coaster

Lately I’ve noticed I’ve been feeling really sad. I could be washing dishes, watering the grass, schoolwork, or doing anything, and I start feeling like I’m about to burst into tears. Even the things I love to do I still find myself about to cry. I will be laughing about something on tv and it’ll happen. I could be feeling happy then boom I feel sad. I don’t know what is wrong with me. Has this happened to anyone? If so what did you do to overcome it? I’m a bit embarrassed so I posted anonymously. Thank you in advance.