That is not a right looking poop. It may be a hairball but I doubt it. It looks partially digested. Double check your temps, make sure nothing got turned off by accident.

Getting a fecal done is not a bad idea but I don't think that's fecal matter. After her next poop get one though. Don't freeze it, just keep it moist and damp. A couple of days that way should be no problem.

Who'd you get her from?