Haggis and tatties wrote:
Plus if she did have any regens left would she not have done so when she died in Forest of the dead, or even worse did Tennets doctor unintentionally trap a fellow timelord in the virtual world thing before she had time to regen.
People always forget that the whole reason River took 10's place in the library was because he wouldn't
regenerate from it. Whatever it was was enough to permanently kill him (and her) beyond the reach of regeneration. So whether or not she still had any regenerations left after "Let's Kill Hitler" is irrelevant - they would have done her no good anyway.