I'm 19 weeks and definitely know how you feel i have a pregnancy disease called HYPEREMESIS GRAVIDARUM, it cause things like you are describing, nausea randomly, diarrhea, fatigue, constant feeling sick, dehydration and more. I would talk to your Dr as soon as you can because if they can manage it and get it early it will avoid all the other complications that can come along with it. Unfortunately though if it lasts longer than 16 weeks you probably will be sick through your whole pregnancy.
I have nausea meds and those don't work. And I'm not thinking morning sickness cuz it's only happened twice now. Granted I dealt with morning sickness horribly before but since I got into my 2nd trimester its went away. And the portion sizes were different, last night I ate a small portion and it still happened that's why I'm so confused cuz nothing seems to work.
I second Mrs. Bagz about talking to your doctor about being prescribed zofran. It's safe and there's no reason you have to suffer from nausea just because it's common. I've taken it and it was a Godsend for me. Just keep in mind that it can cause constipation so talk to your doctor about getting a stool softener too.
This happens to me and I'm 13 weeks. It happens if I eat too much food. If I don't eat a lot I'm totaly fine! I find it is better to eat a small amount offten. I haven't had morning sickness at all im only sick after earring a really big meal.
I had morning sickness until the end of my second trimester.
Its different for all women, every pregnancy.
Hope it gets better. If not, talk to your doc about a good nausea medicine like zofran. It'll help with the nausea and you wont have a problem gaining weight.
Some women have morning sickness through their whole pregnancy.