rear damper bolt missing/possible output shaft bearing failure?

i am in need of some advice. i lost my lower mounting bolt to the rear damper while driving from san francisco to los angeles. i noticed after going over a terrible bump that the rear got very springy, so i pulled over to check. i saw that the lower bolt had been thrown from the bump (it had probably been loosened from vibrations over time and this was the last straw) and therefore the damper was merely pivoting on the upper bolt. i was forced to drive 200 more miles back to los angeles without the damping action as this occurred right in the middle of my way back home. i only weigh 150 lbs and tried avoiding any large bumps or dips to limit swingarm travel, but still hit some regardless, which made me bounce around a lot. i later found that the mounting threads were stripped when i tried replacing the bolt upon returning home, so i'm opting to just replace the whole unit with a bitubo. i later read that the factory recommends checking the torque settings on those bolts every few thousand miles--go figure.

i should also say that the engine was rebuilt about 4000 mi ago due to an output shaft bearing failure from the previous owner--he wheelied the shit out of it, weighs like 220 lbs and drove like an animal for about 100 mi without the bolt (it had fallen out on him as well).

my question is this though: have i ****ed the OS shaft and bearing again from too much travel in the rear?! is this something that you would notice audibly while shifting gears or rolling on power? or would i feel it? am i putting way too much stress on the chain going over any sort of bumps or does it take a real whopper to bind the chain? what is a tell-tale sign of a thrashed output shaft or OS bearing?

the shifting feels fine and smooth, and i don't here any unusual noise coming from the engine or sprocket area. the chain has the normal amount of slack when i'm sitting on it (slightly more than an inch). there's no oil leakage either. however, on a handful of occasions, the chain felt like it hopped as i drove over a sharp little bump while rolling on the throttle (e.g. the reflective knobs marking separate lanes). i haven't pulled the front sprocket cover to visually inspect the teeth yet.

granted the bike is grounded until i replace the damper with a bitubo, but am i just being paranoid? mistaking chain hop for just a little jarring bump NBD? or is it possible that i've already damaged the gearbox or bearings without any symptoms? (meaning is this one of those problems that would make you shout, "oh shit, something is definitely wrong here?!")

any words of wisdom or previous experience is helpful. i know this is a barrage of questions and a lot of detail, but i figured a clear scope of the history and situation would aid in a more thorough response.

thank you in advance.