Way overdosed
12 mg is the ideal dose for a standard adult. I may be tired but I think your dosing converts to 20 mg.
The proper dose is 12 mg/day x 5 days
For a person weighing 176 lb (80 kg), 150mcg/kg would be 12mg, and 200mcg/kg would be 16mg.
12 mg doses are often cited for simplicity, I think because the pills come as 3mg.
I have seen much higher single doses used (600mcg/kg). And I have seen it used for 5 days in a row.
There is a lot of variety in dosing, but 12mg seems to be plenty, while adding more seems safe. Ivermectin appears to have a very high safety profile.