If you have used protection and no recent history of unprotected sex chances of HIV are negligible.
Probably the bumps you describe may be related to contact allergy/latex allergy.
In some cases fungal infection can also occur as a result of moisture and manifest as dryness and flakiness you describe.
I would suggest you to treat this condition with anti fungal ointment like 1%Clotrimazole (brand name Canesten or Lotrimin)
Fungal infection do respond to anti fungal topical treatment in most cases.
Also if there is any associated itching you can use anti histaminic like cetirizine.
Avoid using products/detergent base etc in the genital area for some days.
Don't panic and this condition will get better with appropriate treatment.
I hope this helps
Well from your history chances of STD are less likely.
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Here's the photos. I know I'm late.
Hi, Sorry to say,these images are not working. As per your history,chances of STD are less. Thanks.
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This is the dry skin http://www.mediafire.com/view/3d8wk86fx1tpnns/dry.jpeg