I am unsure if 1ml of Injectable Ivomec is a high enough dose for an adult.
I have two colleagues who both took the same type of Ivomec.
One weighed 90 kilos and his chosen dose was 5mls. He took this dose for six months daily. He had River Blindess worms. He has been cured for a year. He will dose twice a year for life.
The other colleague weighs 55kgs and her dose was 4mls. She took this dose once every fifth day. She has crusted scabies. She broke out in a "dead mites" rash on the fourth day after the first dose.
I am far from knowledgable on Ivermectin as it has never worked on my parasite. (collembola/bird mites).
Other more experienced members may want to give their opinion. I thought you may want to consider the possiblity of increasing your follow-up doses.