I had just about convinced myself that I had rampant secondaries and this morning had a crushing central chest pain. It seemed to be a heart attack, but I remembered having something similar caused by esophageal spasm. I took some Gaviscon and lansoprazole and felt better. It was probably down to anxiety because I had my CT scan today.
I spoke to the radiologist afterwards. He hadn't had a chance to measure anything, but just eyeballing it, there seems to have been no change since last times. No more worrying this side of Christmas.