It is not uncommon for women to not experience pregnancy symptoms at 18 weeks and 5 days. Every woman's pregnancy journey is unique, and some may have fewer or milder symptoms compared to others. As you progress through your pregnancy, it is possible for symptoms to come and go or even disappear completely. However, if you are concerned about the lack of symptoms or have any other worries, it is always best to consult with your healthcare provider for reassurance and guidance. They can provide personalized advice based on your specific situation and help address any concerns you may have. Remember that every pregnancy is different, and what matters most is the health and well-being of both you and your baby.