I thought of taking a day of rest, but took an aspirin instead and moved on. Very slowly to Lichtenstein, mostly on cycling paths far across fields and away from traffic. Then crossing Rhein into Switzerland and following it on Radweg 2, one of excelently posted cycling paths here. At that point I felt strong enought to leave the path and follow the road to Chur. Then the road left the valley and went up. I was slow on the narrow road and the traffic was horrible. The truck driver that had to wait for a moment behind me was honking and wawing his hand. What did he mean? "Get off the road and go cycle on the bloody Radweg that we biult for you"?
Day 5: 126 km, 7h 12m.