I'm really impressed. You've taken and abstract idea, the borderline of human emotions, and tried to express it visually.
It is not at all easy as you have two main problems, one is that it can be very difficult to empathise yourself. The second and main one is that emotion is really the response triggered by your image in others and for that they also need an emotional connection to what you're trying to convey. It is wrong to think that you can hand that out on a print, the emotional response must always reside within the viewer and their own experience.
However there are some suggestions using some well trod formula, but you must always balance these with your understanding and your desire to be serious about this rather than cliched, as my suggestions are prone to be.
With the pillow, Dan is correct. Pillows are often regarded as symbols of comfort, remove it. The clasping hands are great, maybe a tight almost painful grip on her own leg?
With the noose try some other connotations. How about the noose being the fuzzy and always present concept OOF but just recognisable? If you experimented with direction, down instead of up and see what happens?
With the heads why not also reflect the moods in your scale of tones to reinforce the expression, dark/light? It can also add depth where the constant tones of the faces suggest equality, (and may also encourage your eye to move more, settle less on the middle, but I may be wrong).
Just as an example, nothing more: