Hello there, I see, you are having nausea after taking any sort if liquid. This is not common but happens with in some people. If this associated with dull aching stomach pain which is continuously bothering you then you need to consult a Gastro enterologist. If there is nothing like that then you need to follow some home remedies like Luke warm lemon juice with a spoon if honey every day in the morning after brushing would do. Thank you