Morning sickness or just the stomach flu?!

My boyfriend and I have protected sex every once in awhile and the last time we did it was February 12 and the last time before that was February 3. On wednesday February 16 I left work early because I didn't feel well. I was really overheated and nauseated. It was nighttime though so I didn't think it could be morning sickness. Later that night I vomited and normally when I throw up I feel better afterwards and wednesday night after throwing up I didn't feel any better. I couldn't sleep that night because laying down was worse on my stomach than standing up and walking around. The week before all this I got severe stomach cramps 3 nights in a row, and the cramps were unbearable and made it so I couldn't walk. Throughout the day I usually feel pretty good, with no stomach pains or nausea but when bedtime comes and morning comes, I feel sick again. I don't know if this is an on and off stomach bug or what but I would like to know what you all think. Also, it is February 20 today and I threw up twice this morning, once at 7:30 and once at 8:30. That was the first time throwing up since wednesday though. Let me know what you think! Thanks!