I dont think so because in theĀ “Series 6, Episode 1: The Impossible Astronaut”, the Doctor actually died and his death was a fixed time, seen by Amy, Rory and River. But then in the “Doctor Who – The Wedding of River Song – Series 6”, RiverĀ changes a fixed point in time and time gets mixed up. So my point is that the Doctor was actually regenarating when he was shot by River and he was not inside the Tessalector. And on top of that, the fact that the Doctor wasn’t able to regenarate anymore was public knowledge.