2 days ago i recieved oral sexsome reason i fear genital herpes my testicle area itch now could it be just in my mind?can symptoms occur this early?

Not herpes: First, getnial herpes is infrequent after any one oral sex exposure. It's especially unlikely if your partner didn't have a visible oral herpes outbreak. Second, herpes doesn't cause itching without sores. Third, location is wrong: any symptoms would be where most directly exposed, i.e. your penis, not scrotum. Third, 2 days is a bit early -- usually 3-10 days. But see doctor if remain concerned.