Gosh, I have no clue WHY you would even ride? Sounds like everything was pointing towards... don't go!
I wouldn't have gone.
Shoot, I had to ride 1:20 tonight on the trainer. I was having a hard time of it and my speed was slower than usually. Just couldn't get my HR up, and I was NOT into it. So I called it quits after 45 minutes. No guilt.
"You gotta know when to fold 'em..."
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"