It is unlikely that a transvaginal eco would harm your baby, but it is important to discuss any concerns with your healthcare provider. The discomfort and nausea you experienced could be due to various factors such as the pressure applied during the procedure or anxiety. However, if you are experiencing persistent or worsening symptoms, it is best to consult your doctor for further evaluation and reassurance. They can provide personalized advice based on your specific situation and address any potential risks or complications. Remember, open communication with your healthcare provider is crucial for ensuring both your well-being and that of your baby throughout pregnancy.