Thank you very much for your post and welcome to our forum.
Chickenpox is characterized by itchy maculopapules that evolve into vesicles over hours to days, then eventually form crusts. Typical lesions first appear on the trunk and face and rapidly spread to involve other areas. HIV can also cause a non-itchy maculo-papular rash, similar in appearance, but mainly localised to the trunk and upper limbs; it does not crust over either. it would normally appear sometime between 2 and 6 weeks after the infection (between 14 and 42 days), not lasting more than 1-14 days, and almost always accompanied by a high fever and a severe sore throat with general malaise.
In summary, I do not believe that your rash is related to acute HIV sero-conversion as it is very late after a possible exposure, that seems to be of no risk or extremely low risk.
i have the bumps all over my body and face and still no itching... i now its a low risk event but im about to go crazy. also, timing of the events its almost scary.
i also don't recall being in contact with anybody that had chickenpox...
thanks for your answer.