Just stop. For a day, then a week, then a month. Don't text, don't call, don't reply.
So many ladies in this industry, don't get hung up on one, and if you worry about what she does with other guys, like literally WTF, she is a sex worker. She may be nice, she may be sincere, and even if all that is true, it is her job, and repeat customers are valued for cash flow and less trepidation about meeting a creep. Unless you are the creep? Anyhow, move on and you will feel better immediately. If you think about her just say get out of my head each time, if you have a text chain, type the words no you fucken bitch, but don't send, so you see it before you text again. Don't fuck up your head, and don't become a stalker or obsessed or taken advantage of.
Free advice, take it or leave it. Given with sincere regards to offer useful guidance.
Good luck.