Morning Sickness

Hello everyone!!! I'm 5wks 2days today! And I believe morning sickness is going to happen any moment now. Last night, after eating, I felt like my throat get right like I needed to vomit, but nothing happened. And again it's happening this morning. I've ate food, just had some crackers now too. But I feel like this feeling will get progressively worse. Tomorrow I have a 3Hr test and I'm really worried I might get sick during it. Any tips ladies???! Thanks 😘