Don't feel bad.

I honestly believe, having done about 15-20 "little six" timing belt jobs that 1 tooth off won't hurt anything but your idle speed and throttle response. I ran one a tooth off for 20 miles back in '99, I didn't understand why it felt so torquey but had so little power when revved all the way up...

Take it back down to the TB replacement stage then start over. If you had bent valves the motor would be turning over very fast with no sensation of compression, and a possible "clack" sound. Doesn't sound to me like you've done that.

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1985 300TD
1984 380SL
1983 280SE (full Euro, trunk triangle and all!)

Formerly owned:
1986 420SEL
1984 300D
1983 300D
1981 300SD
1976 300D