Genital herpes will be something like this, within 2 to 3 days of sexual exposure there will be multiple vesicles with reddening of the skin around the genital region, within 7 to 10 days they break and becomes ulcers which will be painful. this stage will last for 12 to 14 days. the brown spot which is non itchy needs an miscroscopic examination for the diagnosis.
Get those black spots checked. You might need to do a skin lesion test to see what is that.