Bad nausea and no appetite for food

I had bad nausea and frequent vomiting in my first trimester as well. And I puked more than just once a day. I tried all kinds of things like nibbling on dry crackers, eating guava, yuyee oil, peppermint oil, etc. Dried sour plum stopped the feeling sometimes. Some occasions, the vomiting seemed pretty violent as well. But I just endure till second trimester, and then I was so so happy it stopped. Nausea still occurs if I smell smtg I don't like. Otherwise it's all good. BUT in some cases, this can last throughout the entire pregnancy! I'd seek help from my gynae in such a case.