If your clothes are hanging off you it sounds to me as though it’s working At the end of the day, isn’t what we’re aiming for a better body shape & composition? If you’re losing inches (try measuring, it can be really encouraging!) but not pounds you may be converting fat to muscle (do you move around/exercise much?) which weighs more but makes you more trim! Are you also drinking more water on your fasts than on normal days? If you drink more in general, your body will retain less fluids. If you drink more on a fast but then go back to less water intake on your feed days your body may hold on to the extra water. It may be worth investing in some scales which are able to measure body fat and water %, this can give you a bit of an idea as to whether you’re gaining muscle mass, losing fat or retaining water
Another thing to bear in mind is female hormones – things like time of the month can affect our loss as can menopause. Then there’s the possibility of underlying medical conditions which can have an effect such as diabetes, thyroid problems and others.
Certainly the first thing to do though is to keep an eye on your TDEE & calorie intake for a week or two to see if you are indeed overeating. If not, try adjusting your fasts (eg, just one meal on your fast days to maximise on fasting time) or consult your doctor if you think there may be another reason for the lack of loss.