It really does sound like you are doing everything right, so as hard as it is, try not to worry too much at this point.Snakes, even at that size, can go a looong time without eating. Is it ideal if she starts eating sooner rather than later? Of course. But as others have mentioned ~14 grams is negligible weight loss. I've had an 88 gram carpet python make me wait 6 weeks before she first took a meal and she is none the worse for wear. I also had an ~50 gram carpet python eat two small meals in 3 months before I had to intervene. Sometimes all it takes is time.
I know you're well-versed in feeding tricks because of Monty, but have you tried leaving the rat/mouse if she doesn't strike off tongs? Have you tried running the head under very hot water before offering for a better heat signature?