When to see doctor for nausea

as long as you can still keep food and water down, you don't really need to see a doctor. i had my worst morning sickness from week 9 all the way to week 13 .. all i can stomach is icy cold water, plain biscuits and toast .. i literally live on just that for a month plus .. when i told my gynae, she said its normal and gave me MS medicine but it doesn't work for me . i still feel nauseaous .. i cannot smell food, see any images of food or try other food th enabove mentioned .. my food aversion was a nightmare .. can't even go out to malls cause i feel i wanna puke .. so yeah, if you cannot stomach any food down, thats the time to see the doctor .. you prolly need the iv drip .. if u can still eat, even just a biscuit, it is totally normal.