Swelling in the feet during pregnancy is a common occurrence, especially as your body undergoes changes. It is generally not a cause for concern unless accompanied by other symptoms such as severe pain or sudden weight gain. However, given your weight of 125kg, it is important to monitor the swelling closely and consult with your healthcare provider. They can provide personalized advice and recommendations based on your specific circumstances. In the meantime, you can try elevating your legs, wearing comfortable shoes, avoiding standing or sitting for long periods, and staying hydrated to help reduce swelling.