I was recently in Bangkok and had a one night/one time encounter with a girl I presume was a prostitute (though not "working" that night). Though I did not have intercourse with her, I did externally stimulate her with my hand and she performed oral sex on me. As it progressed, she squirted fluid all over my hand, which at the time had an ingrown fingernail that was approximately 90% healed. I say 90% because visual appearance looked as if it was all healed, but by using much force, I was able to make a small amount of puss bead up. Minutes later I washed my hands with soap and water.
Am I at risk for contracting HIV? Is a test warranted?