Sorry you are feeling so poorly. I wouldn't take the Clarkia for a few days. Start it again on Saturday, just before the new moon and take it until 5 days after(moon is on Monday,)Saturday to Saturday.
Sometimes your body doesn't take well to certain herbs or it could be die off but I didn't have die off that fast. When I get die off it is always been a dull headache and aches and pains, sometimes a slight fever.
I would also take the same dose each time 3 drops morning and 3 drops at night. Only start with twice a day the next time. The pills may work better for you, maybe the tincture goes into your blood too fast. There is a product Hanna Kroeger sells and health food store also, called Cina, little white pellets that you put under your tongue for parasites.
Rest today, I hope you feel better soon, let us know how you are doing..heyjude