Dark Spots on One Areola

Hey all! I recently skipped my period but i had negative urine and blood tests after 12 days of skipped periods. hcg was 1.20. however since a bit my right areola has some dark brown spots, some almost look like they’re forming a ring also at times i don’t know. Is this normal to have? Could I still be pregnant? Haven’t even ever had sex though, I’m a virgin but yeah otherwise I have been sexually active for example just genital rubbing.