Limitless,

Did your CS Therapist manipulate your neck? Sometimes, it is more like a deep neck massage. This can be effective as it reduces inflammation in the neck which can reduce other symptoms. Most head injuries have a neck injury component that is over-looked.

The recurrence of the swelling could have easily been from the Yoga neck and shoulder movements exacerbating the neck injury. A Physical Therapist who knows neck mobilization techniques may be able to help.
For nuero rehab, look for a specialist in Physical Medicine and Rehabilitation.

FYI, If you really want to sweat, get depressed and ask a doctor for a prescription for an SSRI anti-depressant like Paxil. With Paxil, you can sweat buckets just thinking hard.