Stomach sickness. Close to bedtime.

I have had this issues for over 3 years. It comes and goes but recently is has been happening a lot and stays for 3-4 days in a row. I wake up in the morning and feel so sick to my stomach and a bit dizzy. My stomach feels like it's full of air and very uncomfortable. Usually I throw up because of my discomfort and after vommiting I feel much better. The vomit is all bile with lots of clumps of thick saliva . Other times when I don't vomit I burp huge amount of air out all day. My stomach seems to be filled with lots of air and bile. This only happens in the morning when I wake up or I'll wake up in the middle of the night from the discomfort. I thought maybe it was due to eating too close to bed time but then I have had it happen when I haven't eaten anything close to bedtime.