Sjoe! What a relief! Saw The Lymph Lady now and my arm is up 2mm in one place. So it's ok.
Now The Yoga Man is going to measure my arm to get a base measurement - The Lymph Lady showed me how (this was his suggestion during my anxiety last night, but based on an original idea of hers) - and then if I hit nervous breakdown stakes, he can measure.
It appears that the flabbiness caused by not using the arm - to help prevent lymphedema - is making the arm look and feel heavier.
I am relieved but find these stressful moments are awful. Now I am a little annoyed with myself for becoming so anxious.