Dear doctor, 1 week ago I came to Pattaya- Thailand. I had flight from Denmark, where is very cold in that time. Of course in Pattaya is very hot. I had some business but one late night I was drunk after going out and meet 26 years old ladyboy. First I did not know that, discover later in the room. I was to drunk to care much. He took a shower and brush his teeth, I took the shower. Later I did him short, maybe 1- 2 minutes long fellatio, but very shallow; no pre- ***, no ***. He lick my anus, also shallow. No else! All happening was maybe 3- 5 minutes long. After I took shower and brush my teeth. Next day I started investigating about this and freak out! I did not sleep for 4 days, got diarrhea next day and white tongue. After have flight back to Denmark and also than could not sleep. So now, 1 week after I have few ulcers in my mouth, under tongue, some headache today, still can not sleep, I am very anxious. I started to take vitamins and Zinc, I fell I will be sick. I do not know what could happened from this one time occasion, I am very worried! I do not know if all is consecuence from planes and hot cold enviroment and travel and stress or I have some STD now, because now I know this was high risk action; ladyboy (actualy gay) in Pattaya, no condom fellatio, ... Please help me with your answer; what is probability that I catched some STD and which? What should I do? Or what should I do if something else come out in next days? Thank you very much dear doctor!