It is not uncommon for a fetal heartbeat to be undetectable at 10 weeks of pregnancy, especially during early stages. However, it is important to follow your doctor's advice and wait for the recommended period before taking any further action. This waiting period allows for potential changes and development in the fetus. In some cases, the heartbeat may become detectable after this time frame. If there are still no signs of a heartbeat after the waiting period, your doctor will discuss other options and provide appropriate guidance based on your specific situation. Remember to communicate openly with your healthcare provider and seek support from loved ones during this time.