Stress points

so you have decided to dive into something a little mentally intense, whether its something as horrific as eldritch beings, or a working mechanic for mental ailments well you have found the right feat . Certain sights events and situations can increase your Stress points and once a stress threshold is  reached your character becomes affected in some capacity   ( preferably talked about between you and your DM)  these points and multipliers stack depending on the active circumstances