That a bit of a coincidence that, I was up all night with my youngest son complaining of head pain, he could not look at the bright lights so off to the emergency doctors at 3 in the morning, diagnosed as ear infection.
has for my ride yesterday (52 mile) it was also with new 105 rear mech, cassette and chain plus tiagra chainset , I also set off with trepidation, rightly so as it turned out, snapped the chain after 10 mile into 3 bits while setting off from traffic lights, hope you have better luck and both kids get better soon.