Peroneal neuropathy, as I think you know, is unrelated to ALS. ALS affects potentially every voluntary movement. Your foot/calf are a very small percentage of all those nerves. The EMG is saying very clearly that the problem is only in certain nerves, and by saying "neuropathy" instead of "motor neuron disease," it is saying that there is damage that potentially can get better. That is not of course true in ALS.
As for your weight loss, it sounds like a good thing if you were overweight to begin with, but it also sounds like a sign of severe anxiety based on your posts. Talk with a psychiatrist about adjusting your anxiety meds, and perhaps see a dietician if your weight or nutritional intake is declining too much according to your GP.
In summary, you do not have ALS, which is a good thing, and you should be posting somewhere else, perhaps on a sensorimotor neuropathy and/or health anxiety board. There may also be a support group in your area where you could meet others with fears like yours. And you have PT to do, that will help you feel better.
You have a full life to live, for which many here would give a good deal, and a young child who needs you at your best. Don't waste it in fear. And please don't waste the time of those here, who don't have the time left that you do.
I am closing this thread because you are going in circles here. Bookmark this thread. If you feel anxious again, reread it. All the best.
Best,
Laurie