There are proven cures for ich. It's hyposalintity or copper treatment. Ich has a live cycle where it is visible for 3-7 days on the fish then it drops of into the sand to reproduce. Since you said it's been 3 days i am inclined to say it just fell off to reproduce. Garlic and other miracle cure have never been proven to work an never will be. Not coming down on you just informing. Keep a close eye on your fish and good luck.
Feed your Filtration
Give it to Porc Chop he'll eat anything!!!!!
"This is my tank and these other fish just live in it"
^ Quoted from Porc Chop^