It could work like this.

lets assume we had a scale of 100.

Depending on the choice, it could add 5+, 10+ maybe even 50+ depending how pivotal the choices are. 

I guess there could also be a scale for good things (removing yourself from stressor, having fun, doing good things) which could subtract from the score. 

But a system like that would get pretty complex, as you would also have to take into account things like refusing to seek help, pretending like it didn't happen... not sure you'd want to keep track of that. It would be a lot of work.