Hi, I have feeling nausea since a few days, along with VERY excessive burping. This evening the burps started to taste of cardboard . In my chest and throat i can feel an aching pain like someone pressing on my chest. It feels very much like indegestion but worse than i can remember. I took omeprazole and gavascon which i took with a little food (i had not eaten today before this due to the nausea) which has taken the edge off but the pain is still there and i still feel very nauseas. I am female, 21 and otherwise in eccellent health. Thank you !