Hello Sara. We were told that the tumor sometimes grows before it shrinks and that it takes about a month before one knows. My husband's feet also swelled up, but we were blaming it on the appetite (steroid) pills he is taking. He was put on Lasix (water pill) for it and is getting relief. He has vena cava syndrome where the tumor presses against the vena cava nerve, and this causes fluid retention for him, in the 'bags' under his eyes. He has been on Iressa for a week and a half and so far is doing very well. He even drove our truck for the first time in a long time today.
So keep the faith - each day is a new day and one never knows what miracles will happen!
C.H.