As I agree and have experienced such 'episodes' myself.

If your thyroid #'s are normal [thyroid can do some very 'fun' things in terms of swelling of the feet, etc. when off] then DO see an orthopedic or podiatrist to watch your feet and occasionally 'wrap' them for support as needed.

Take a look at the following web site. It explains somewhat how your malfunctioning nerves aren't telling your lymph system how to work properly and that can result in swelling. For me, it's the ANKLES! They can 'puff up' if I look at them wrong! Gentle light massage of the skin/muscles all the way UP to half-way up your calves can help work out any excess fluids sometimes. I've had this done at PTherapy and do it myself now when I really need it - it works! And yes! Your shoe size can change dramatically during these 'episodes'!
http://telemedicine.org/stamford.htm

I hope this helps and let us all know what happens! - j