With regards to stress, you could just make a Stress pool; maybe have it increase by 1 every time you roll a 6 and below? Then you could do shit like:
[*]At a Stress of 1, you're okay, just, you know, stressed.[/*]
[*]At a Stress of 2 to 3, you're maybe shaking a little, maybe you're having a hard time focusing. Take -1 to all rolls.[/*]
[*]At a Stress of 4, you take -2 to all rolls.[/*]
[*]At a Stress of 5, you end up cracking. Maybe you break down crying, maybe you lash out at someone, maybe you finally give in to your lust for your teammate. This is less of a mechanical consequence.[/*]
You reset your Stress by resting and so on.

That make sense?