One of the best ways to determine your weight is by being upside down on your hands. It takes the whole numbers game out of the equation and allows you to focus on your strength and mind / body connection. We should all be able to hold our weight, push our weight and pull our weight. If you cannot then you need to get stronger and or get lighter. It is the nature of our bodies.
So if you have been focusing on the latter and your weight hasn’t changed then focus on the former. Why not get stronger? Use your weight to increase your strength. It takes weight to move weight. I guarantee that if you focus on gaining strength so that you can hold yourself upside down then in the end you will find that you are lighter which ultimately means you weigh less.