on my arm, under the skin but flat and today another one bigger than the first one has appeared. I have also noticed one more lession on my breast.Could it be Karposi Sarcoma
I can't really say you really need to see a doctor to determine that, as for HIV, yes unprotected sex is a risk a test at 12 weeks post exposure will rule in out of the equation.
kaposi sarcoma.. occurs when your immune system fails down.. umm..just say when your CD4 cell count is less than 200..or something like that.. but nowdays its not so much common bcoz of drugs.. if u had unprotected sex then better get tested...