After you have had sex with someone how long does it take for the symptoms of herpes to appear?

Herpes can take any where from 2-30 days or longer if your immune system is strong enough to suppress it.
Keep an eye out for symptoms like painful itching, burning and or tingling sensations, flu like symptoms, swollen genitals, trouble or burning when you pee, blisters or open cut like sores appearing. If you have any of those symptoms then get checked out and tested for herpes at your doctor, gyno or local clinic.
I have oral and genital herpes.