Therapy has helped me a lot (and often times that is from a free or reduced fee clinic... I think I have only ever seen a private practice therapist twice). I can totally relate to that chest-crushing feeling. I would caution however to keep tabs on it. If it ever does feel like more than just the depression, I would urge you to seek medical help. One incident was legitimately cardiac issues for me that happened to be triggered by the streets of the intense depression...
Outside of that, do you have a therapist? Speaking to one could be very helpful. They could also help guide you to other resources for improving your living situation (if not hook you up directly with other resources).
Keep posting and teaching out. (Hugs)