this was pretty much no risk due to the brevity of the encounter alone. you had no reason to self treat needlessly with antibiotics and put your health at risk from doing so :(
you don't need any testing. no std causes symptoms the next day.
grace
I think you are fine, from everything I have read and researched, the oral represents a very small risk, especially considering it was a very brief interaction.
I would not think about taking any other antibiotics at all.
If anything, wait for symptoms to appear and then evaluate.
Good luck