This framing is at the very least maladaptive and possibly indicative of the mental illness they are writing about. Mentally healthy humans regulate their behavior around other humans depending on the context. Sometimes this produces anxiety. And the fact that the author can pull that off at all (even with some difficulty) is a positive sign.
There is no reason for an employer or professional colleagues to be aware of an employees medical issues. Maybe there are exceptions for in-office workers with conditions like epilepsy. There are plenty of companies with no questions asked PTO, and as long as they do good work (which the article indicates) no one will bother them for using it.