I think she was going to try and cut her throat but Arya threw herself over.

I don't think you're remembering Margaery's behavior in that scene very well.

Those wounds are almost certainly lethal. She needs help, likely of the supernatural kind, if she is to survive them.

The most vascular organs in the abdominal cavity are the liver, kidneys, and spleen. This is not surprising since they perform the function of cleaning the blood of various toxins, chemicals, and pathogens, and large volumes of blood will be passing through those organs at any given time. Knife wounds into those organs will statistically be far more dangerous than knife wounds into the bowels or the bladder, for example. But again, it still depends on exactly where you got poked. The larger the blood vessel(s) that got burst open inside those organs, the shorter your lifespan, which in these cases could be measured in hours to days. Or even minutes, if you got really unlucky.

An interesting fact about knife vs bowel (small & large intestines): it is actually far less likely than you think for a knife penetration into the gut to actually result in perforation of a bowel segment. Knife thrusts typically do not move fast enough to penetrate bowel, and they are more likely to move out of the way of a thrust so that the blade slides in between bowel segments, than to actually be penetrated. (This is definitely not the case with a bullet penetration, incidentally; they will perf anything and everything in their flight path; bullets also create potentially massive temporary trauma cavities along their flight path, all of which contribute to bullets having far more stopping power than knives; but this is a discussion for another Quora topic.) However, even if a bowel segment is penetrated by a knife, the relatively lower vascularity of bowel means that it will likely take far longer for you to die of blood loss, possibly several days, or perhaps even not at all. Another possibility for death then comes into play in this time frame, however, namely sepsis and subsequent septic shock, due to the fact that a perforated bowel will be leaking gut bacteria into what is otherwise a usually sterile environment; skin and environmental bacteria may have also tracked into the wound cavity along with the blade or migrate into the wound later. And if they end up getting into your bloodstream, you are definitely a goner without the proper treatment.

All in all, if you were to get stabbed in the abdomen, the biggest target will be the small and large intestines (covered by the omentum) due to the fact that they take up the most real estate inside your abdominal cavity. Fortunately for all of us, knife wounds into these structures offer the greatest chance for survival until we receive the proper medical treatment.

I think that scene made it pretty clear that Margaery was having none of Loras' advice.

aside from the great name, the other reason the 'tube of time' stands out so much in my memory is because the reason it was such shit was that the weeknd we were suppose to get together and work on it, instead we just went friend B's house and he showed us all his dad's sex toys. including the must bizarre cum vacuum device that I still don't understand.

arya has too much "plot armor" to die right now.

so margaery is definitely playing the high sparrow right? that's what the rose illustration she gave to the queen of thorns indicated?