6 Months Ago I Got A Look To Be A

6 months ago I got a look to be a ingrown hair (1/4") it blistered for 2 days and scared, recently I have like 4-5more within a 5" area tiny insect looking bites? this all right at the belt area slightly below. ok now ive been std tested 3 yrs ago, been with 3 woman im sure they are clean just from knowing who they were. I went to a dermatologist she didn't know what it was so now im here.