Did i do a horrible mistake?

I slept with a waitress yesterday as she needed money for buying an air ticket.I did not ask her she was the one who asked me after i tipped her quite generously.Im a virgin and the offer was too tempting.She was so desperate she even told me that she could take me to the doc where she had her medical tests.I did not go there but i saw here ceritificate and she was clean and looked healthy.She did not looked guilty or anything after we did it and told me i was very generous as i gave her a lil extra....did i do the right thing?