A heavy weight in my chest

I am a pretty happy person in general... we all have our moments. Although a few weeks ago I woke up really sad. it was like no other pain I had felt. It was like this really heavy weight in my chest. for about 7 days I was experiencing this and had no motivation to join conversation or interest in holding one. Then it passed. Two weeks later it happened again for no reason. I felt very sad and didnt want to speak at all. My Mom and Brother got very worried because I couldnt hold a conversation Which is so unlike me. Its like I have verbal diarrhea! Anyway I am wondering if anyone has experienced anything simmilar that knows what it is?