Is this something alarming? need your suggestions! thank you!?

I've been having heavy breathing problems these past few days. now, i can't seem to breath if i wont elevate my body while sleeping. it's like a heavy weight is sitting on my chest.i'm not having cough or colds or fever. but my chest feels tight like it's contracting. i was just thinking this is just "stress". but i'm starting to get worried. anybody who just experience this once in a while and then just pass by after a night? i don't wanna see a doctor as much as possible. i need suggestions. thank you!