She had black spots all over her body? Herpes only affects the genitals or the mouth - not the hands, etc. I don't know what she had going on - maybe an allergic reaction, chicken pox, or something entirely different.
Herpes also doesn't cause black spots.
I also don't know what medication you used on your penis, but I wouldn't do that anymore. Washing your penis after sex doesn't do anything to prevent an STD, and some things can be really irritating.
Unclothed skin to skin contact, and friction - usually the kind with sex, can transmit sex. Oral to genital, genital to genital and genital to anal contact is what can transmit it - oral sex, penis in vagina, and anal sex.
You had protected sex, so if she did have herpes, you reduced your risk significantly.