5 month stall
Sorry to hear you are having all these issues. There are several things that can cause this to happen. You haven't given much detail about your nutritional strategy, your exercise routine or your choices of motivation. Keeping a journal of all that you eat, why you ate it (was it just because you were bored, etc), and also your activity levels for a couple of months. That way you can see if there needs to be some lifestyle changes. Sometimes, it's because we don't eat "enough". Our body needs fuel to survive and if we don't give it enough, it starts to eat itself (muscle). I know that is icky but it's true.
Anyway, start with the journal and then go from there. Hope that helps.