The chiro did not cause reconcussion. He was more likely too aggressive with your neck and the strain from an adjustment caused an increase in inflammation that increased symptoms. I tell people to avoid the 'twist the head and pop the neck' adjustments. They may work for C-3 and below but put too much strain on C-1 and C-2.

Cranial Sacral Therapy can help if it is directed at the spine. The cranial plate work is highly suspect. Helping the neck settle down can be a big improvement.

Self-treating requires discipline to limit fast head and neck movement so the neck is not stressed.