I would like to ask about an STD related question. 2 days back I encountered a person who was a ladyboy. The whole time I was with my boxers. The person was touching my penis first. Then dry humped the person's buttocks with my boxers for a minute. Please let me know if I contracted an STD. Yesterday, I was vomiting and feeling nausea. I am not sure if it is because of food poisoning or std. I feel so stupid for doing this. Please help.