It is generally safe to have sex during the first three months of pregnancy, as long as there are no complications or medical conditions that would advise otherwise. However, it is always best to consult with your healthcare provider for personalized advice based on your specific situation. In most cases, if you have a healthy and low-risk pregnancy, engaging in sexual activity should not harm the baby or affect your pregnancy negatively. It is important to communicate openly with your partner about any discomfort or concerns you may have and listen to your body's signals. If you experience any bleeding, pain, or other unusual symptoms after intercourse, contact your healthcare provider immediately. They will be able to provide guidance and ensure the well-being of both you and your baby throughout your pregnancy journey.