Please don't take this the wrong way, but I think it's possible you may not have seen every time she's gone. My cham is pretty regular (every day), but between changing his 'spot' and plant growth, it often lands in a spot where I don't see it for days/weeks. It also looks like you have a (bioactive?) substrate, which can camouflage things, or if you have an active CuC they can make it disappear.
I'm not a vet, but IMO, blood, that first pic, and coprophagia are all reasons to seek veterinary help.
Take a sample (less than 24 hrs old if possible—you can store it in a double baggie in the fridge).