Yes, it is completely normal to experience nausea without vomiting during the 5th week of pregnancy. Nausea, commonly known as morning sickness, is a common symptom that many pregnant women experience in early pregnancy. While some women may also experience vomiting along with nausea, others may only experience the sensation of being nauseous without actually throwing up. Every woman's body reacts differently to pregnancy hormones, so there is no one-size-fits-all answer when it comes to morning sickness symptoms. As long as you are not experiencing severe or persistent nausea that affects your ability to eat or drink, there is usually no cause for concern. It is important to stay hydrated and try eating small, frequent meals throughout the day to help alleviate the symptoms. If you have any concerns or if the nausea becomes unbearable, it is always best to consult with your healthcare provider for further guidance and support.