Since there are so many variables in this scenario, my suggestion would be to pay a visit to your doctor and describe the rash if it is still there and have tests taken accordingly. Otherwise, you could have private tests taken for herpes antibodies after May 3rd (your post is dated Feb 2). It can take 3 months from the date of contraction for herpes antibodies to appear. Before that, you can test negative and still be positive. I hope this helps. ~ Mari
Okay, so first, let's not assume this is herpes. It could easily be a reaction to the Dettol. Don't use that again on your genitals. It doesn't work as you want it to work - once you are infected, you're infected - you can't "wash it off" or "disinfect yourself". Also, Dettol is a strong antiseptic, and shouldn't ever be used anywhere in the genital region.
What you need to do is see your doctor, who will be able to tell you if your rash looks like herpes or a reaction to the Dettol, or something else entirely.
Lastly, just to note, if someone has herpes (and I am by no means saying you do), they can be infectious without symptoms, and can therefore transmit it without symptoms. Some swabs can test for viral shedding, but those are not that common and are more expensive.
In any case, just get yourself to a doctor soon, and feel better. :)