So I'm Always Tried Can Sleep 15 To 18 Hours

So I'm always tried can sleep 15 to 18 hours daily and still tired also for the last few months every morning I wake up vomitting when I lay down and at random times of the day I get stomach pain and vomiting. Ramndomly I get chest pains and it hurts to breathe but these only last like 10 seconds and don't happen often