I got bit by a spider possibly brown recluse, first day I felt feverish and body aches then noticed a reddish area center of my right butt cheek about 5 dia. second day more fever followed by chills and sweats and feeling run down, red spot now about 6 dia maybe bigger, third day less fever down to 101 feeling better however red spot now 7 Day 4-14 fever is normal temp however red spot currently covers my entire right butt cheek has grew in size every day, pinkish red throughout with a darker blue red area inner half, no pain with little discomfort should I be concerned