I'm voting for your last entry - you are worried about this encounter so much that you are making the proverbial mountains out of molehills. Just itching is more likely fungal ( aka jock itch ) than it is herpes. Oral sex transmits the normal mouth flora to the genital area where it's not always tolerated so well and can cause fungal infections pretty commonly.
grace
sorry one last thing. ive been really stressing about this ever since the encounter so could these symptoms just be me working myself up too much?
also, i should mention that i noticed 3 small bumps on the inside of my cheek 2 days after the encounter. i popped them on accident and they were painless. i washed my mouth out with hydrogen peroxide that night and they were gone within a day and a half.