My first pregnancy I was like that all the way up until 6 months. It's normal. They gave me zofran , but I hated it and stopped taking it cause it have me headaches. Which is a side affect if you take them. I just are small things. Like crackers and cheese , tuna , and fruit. That was basically all I could keep down. Try that. My mom had got me these things called sea bands. They help with nausea. If worked for me. She got them at Walgreens.
Until your doctor prescribes something you can try anything with lemon, water lemon candy. I also strangely think pickles help me lol. Worth a shot. You can also try b6 and b12 vitamins with your prenatals for naseua. Good luck.
Nausea can happen anytime. I would call your Dr and have them call in a prescription.