vomitting without actual vomit

So I was brushing my teeth this morning and I think I had a gag reflex and starting gagging but since I hadn't had breakfast, nothing came out. It was quite bad went on for a minute or so. I don't feel nauseas but I think this is the second time I vomit? First time was this week when I finished dinner and vomited immediately but again was not feeling headache or nausea. I'm in week 13 idk if I should be worried?