This could be scabies and probably you would need a retreatment for this. You should consult a skin specialist for your symptoms.
'Apply the medication to a clean body from the neck down to the toes. After leaving the medication on the body for the recommended time, take a bath or shower to wash off the cream or lotion.
Put on clean clothes. All clothes, bedding, and towels used by the infested person during the 3 days before treatment should be washed in hot water and dried in a hot dryer.
A second treatment of the body with the same cream or lotion may be necessary. '
You could read more about this at the following links -
Let us know about how you are doing and if you have any other doubts.