Kelly, the after pain you speak of sounds to me like what is often referred to as shadows, which are common.
Headbangers have found ways to suppress shadows, such as ......ginger.
As a person who is willing to listen to anyone, it sure is fortunate that you ran right into people who are long, long LONG time studiers of everything that can relieve CH, and constant observers of how well things work among the CH populace. IMO they are without exaggeration some of the world's foremost lay experts on the practical realities of fighting CH!