Do i have impetigo? scabies?

Source:  Do i have impetigo? scabies?    Tag:  what does impetigo look like
i have this rash/blister on my legs that dont seem to be going away. they started out as bites (not sure form what) or looked like bites and due to some realllyyyyyyyy hard scratching developed puss filled blisters that pop and start oozing this liquid. it also crusts over after it drys. i remember how it started, a single bite that had a scab that i picked at, then a rash developped, now i have pus filledblisters all over both legs (its been about a week since the bite) do i have impetigo? or mabye scabies? i hope not, im going to the doctor tmrw so im kinda worried bout what he might say and i wanna knowwhat i have and not be surprised when i get there, so...any help?