Hi, @6pingvin I guess you are new on the market like me, and of course, it is normal to be nervous about getting an STD especially the first time.
But think the most decent thing is to ask the person, or simply read all the reviews you can find of the escort you planning on visiting to make a decent estimation.
I don’t think anybody in here would know it better than herself, unless they had been infected with something, which you clearly would have found in her reviews if she had, and from the above message from @Sensual.massage which I assume is Michelle herself she is feeling the same way.
Also I don't mean this to be an attack on you question, of course, you can ask in a forum, this is what forums are for, and yes STD is still kinda taboo on escort site.
But I would properly ask for advice on how to protect yourself, or talk to one of the personal on the sex clinic like this one in Odense https://www.seksuel-sundhed.dk/book-tid, to learn what you can do or how to protect yourself, if you didn't had sex education in school. The safest is not to have sex or to protect you self with condoms or something like ‘oral dam’
So my suggestion is to ask the person I am pretty sure that she or any other escort woulden mind the question it only shows you interested in both of your well-being.
Furthermore as a little bonus I can confirm Mishelle doesn't get mad about the question. I have booked a massage with her tomorrow which is going to be my first ever escort visit, and like you I am also nervous about it which I only think is natural to be. but she simple replied that she are getting tested regularly, which I assume everybody in this service does.I actually think she was kinder flattered by it. in only showing that you are interested in protecting yourself just like most escorts would be in protecting themself.