It is completely normal for some women to not experience any noticeable pregnancy symptoms at 15 weeks. Every woman and every pregnancy is different, so there is no need to worry if you are not feeling anything yet. Some women may start feeling the baby's movements around this time, while others may not feel them until later on in the pregnancy. Additionally, some women may not experience common symptoms like morning sickness or breast tenderness. However, if you have concerns or are experiencing severe pain or bleeding, it is always best to consult with your healthcare provider for reassurance and guidance.