Probably fine. The yeast is healthy.
Was it a diluted solution of Star San?
yeah it was a diluted starsan... it'll most likely be fine.. been brewing since 1999 and this was the first time I left sanitizer in the carboy. have done lots of other things including sticking my arm into the primary bucket and inserting the drilled stopper into a carboy to far and watching it drop into the wort. one thing I learned a long time ago that really helped me not freak out on these little things is.. relax.. people have been doing this for thousands of years.. in the end we're just making beer.