Good luck! https://www.amazon.com/Norbrook-noromectin-mililiter-percent-injection/dp/B00M1UR9YW/ref=sr_1_4?ie=UTF8&qid=1520504039&sr=8-4&keywords=ivermectin+solution is this the one you bought?

Edit: also I see you have read the study on oral ivermectin and demodex mites, in case you missed this but it says 'during the first week of follow-up, no obvious change in the mite count was observed in all the groups receiving ivermectin' so there might be a temporal lag between taking it and experiencing mite die-off symptoms