Sounds like die off to me. I have done routine maintenance with Wormwood for years without growing horns and fangs. But I have felt like I was growing horns and fangs from alcohol, and seen other people who were drinking, growing them.
If you would rather die fighting them, than wave a white flag and let them kill you with a long miserable death in between the pain killers and anti-anxiety meds, then lower the dose and reduce the die off symptoms until they are tolerable.
parasite cleansing is not for everyone. In order to be successful, you must have a warrior spirit.