It is unlikely that you are feeling fetal movement at 5 weeks pregnant. At this stage, the embryo is still very small and not yet capable of producing noticeable movements. The sensations you are experiencing may be due to other factors such as gas or muscle twitches. However, if you have any concerns or experience pain or bleeding, it is always best to consult with your healthcare provider for a proper evaluation. They can provide personalized advice based on your specific situation and address any potential issues.