Buzzing or vibrating feeling in left side of chest

Weird buzzing feeling left side of my chest under breast. For the last couple of months I have been experiencing a weird symptom. When I lay down sometimes I get this weird vibrating feeling on the left side of my chest it’s in the are under my breast. It last one second there’s no pain but it does wake me up from my sleep, I get scared about it because I don’t know if it’s my heart but it doesn’t feel like a palpitation it’s more like a buzzing feeling. Also it only happens as I’m falling asleep.

Does anyone have this?