There's many possible reasons why she reacted the way she did.
One, maybe she is just unprofessional and your session with her would have been a WOT even if she replied friendly to get you in the door then she gave you attitude later.
Two, she was having a bad day, and you annoyed her by making a last minute request, but she is not usually like that.
Three, she doesn't appreciate last minute requests in general, because she had no shows before after complying client's requests, and you set her off by doing so again.
The possible reasons are endless and we will never know because you cancelled your appointment. However, if I was in your position, I would have bailed too, but not necessarily because I sensed bad vibes, but because I knew such language means she's not in a good mood, and that's likely to spoil the session and I would not have taken the chance either.
However, I have not gotten into such situation as you did. Because I don't make last minute requests that will require extra efforts, like costume requests. Also, I never made requests with a SP I have never seen before. I usually go see someone new and enjoy what she offers for the first time, if the experience turns out to be positive, and I know I will be back, then I will make requests prior to my return visits if I sense that she will be willing to accommodate.
Last piece of advice: don't make last minute requests and you would not have likely run into such situations. If I have requests in mind, I will inquire about it before I even make a booking. As in, if I got good vibes with a lady after our first date, me making a request for our second date would go like this: Hi, I know it's only Tuesday, and I am thinking of seeing you this Thursday, and the reason I texted you now is because I would like to know if you would be able to accommodate my request XXX and if you would be able do so before Thursday. I am also open to adjust my schedule to accommodate, but I really would like this to happen. Let me know what you think. Thank you."
I treat each appointment as a potential date that I can customize, so I spend extra time to make a booking that fits my schedules and satisfies my requests. Last minute bookings are simply not my style, because they leave very little room for adjustments which will make the date turn out to be exactly what I wanted.
Don't let your urge take control of your mind. If you feel the need to release bad, rub one out, not spending money for it.
Peace out.