Drinking LOTS of fluids and breathing steam help loosen up that phlegm.
Are you taking Mucinex? It's over the counter but my doctors have recommended the maximum strength dose to me prophyllacticly to loosen the phlegm and make it easier to cough up. I take it every day inspite of the fact that I can't remember my last acute attack.
You can also put a couple bricks or blocks of wood under the legs at the foot of your bed to incline your feet. Thick as that phlegm is, it's still a fluid and, overnight, gravity will cause it to settle higher in your bronchioles where it will be easier to expel.
There's also a thing I used to do when my asthma was it's worst. It's hard to describe but if you concentrate on coughing with you diaphragm, you can propel some of the phlegm in the deepest recesses of you lungs upward. Try for clusters of deep but small coughs that loosen and gather the phlegm and then a big one intended to evacuate it. When I went for the big one, I put my thumb into the hollow at the base of my throat between my clavicles, I could create a sort of venturi at the top of my bronchial tube. That helped increase the velocity of my cough and make it more effective.
Finally, when I was hospitalized, there's something respiratory therapists do. Perhaps you and your son could do it to one another. Take turns lying on your stomach with your lower body inclined, if possible. Then the other cups his/her hands slightly and claps/pats on the back in the area of the lungs -- particularly the lower portions -- for 10 minutes or so a few times a day. It's a thumping motion that isn't intended to be painful but is meant to jar the phlegm loose. You guys may or may not have the energy to do this. I dunno. But it was a regular part of the therapies they used to help me.
Hope some of that helps!
Wish I had something to offer regarding unemployment.
Good to hear from you and know you can at least move around. Don't, of course, do it more than you're inclined to but we ARE grateful to get an occasional report. We're pulling for you and for your son!