Do I have the right to know who, if anyone, turned me in to the police?
At the moment, no.
Eventually, after you've been indicted or charged, arrested, and arraigned; you surely do have the constitutional right to confront your accuser(s).
The world will eventually learn the identity of the little rat that ate your cheese, boss. It takes time, but good things come to thee who wait.
The rats or snitches can be hidden for a limited amount of time.
So,if you're arrested, immediately INVOKE your right to shut your trap, and your right to have a lawyer.
You simply bide your time, allow your lawyer to do what lawyers do, and eventually after you have pled not guilty, requested a jury trial, your accuser will be commanded into court for you and the world to see.
In the meantime, be smart, stop yammering, plead not guilty, get yourself a mouthpiece, or request the court to appoint a public defender (assuming you qualify), and wait for the process to unfold.