I did not have any symptoms, but I stopped 10 mg, so that was easier.

You are on an extremely high dose of Olanzapine, so agitation and irritability should hae been controlled by now, but they are not, so it is worrisome indeed.

tightness in the chest is a serious symptom. I do not know what it might be attributable to, but I would definitely report to the nursing station. Also, if they are not doing it routinely, ask them to monitor your blood pressure and pulse several times a day.