I read your present & past history with interest.
Understand your situation & my clinical hunch tells me that the discharge & this rash are not linked.
It does appear that these are psoriatic lesions more than an STD probably a form of guttate psoriasis
aggravated by the vaginal infection
Might i suggest taking an antibiotic kit containing fluconazole
200mg, tinnidazole 2gm & azithromycin
500mg-1 gm that will take care of any residual infection & may benefit these skin lesions.
However this will require a prescription in most parts of the world & suggest you visit a dermatologist
Do practice safe sex as a routine & Godspeed!
Dr Praveen Rodrigues MD
Dermatologist, Cosmetologist, Venereologist