Buy a HR chest strap and use your phone. RideWithGPS, Strava, and many other apps do exactly what you want.
If you do get a Garmin watch, Garmin Connect keeps track of your workouts.
If you can't find a log you can just bend at the waist and reeeeeeeelax as best as you can. It's difficult because the pain is intense while your shoulder is venturing away from home. For me it always helped to rotate my arm forward and back very slightly, like a pendulum from front to back...
Good riddance. Pallet fires are bullshit! The very best at it leave behind a pile of nails. Pallets are often contaminated with toxins. Most don't burn them completely and leave an ugly pile of unburned crap for the next person.