Eh normal lah sayang, nausea boleh last sampai second trimester, especially first baby! A few of my mum friends cakap depa pun rasa macam tu around 13-14 weeks, pastu slowly settle down. Try makan small frequent meals, sip on ginger tea or lemon water, and rest when you can, sometimes rest je boleh help ease the nausea. But if it's really bad or you're not keeping food down at all, better check with your doc to make sure everything's okay.