Every female is different. Yours had a pretty significant response to her hormonal changes. The hormones strike the uterine horns the same whether pregnancy takes place or not. For the first 63 day after the heat cycle it is not good to spay, because she is more swelled in there and more bleeders. Best to wait 3 months after the heat cycle to spay and then everything should get back to normal.
I have heard tales that when you spay during a reaction like this, you can trap a dog in immaturity, but I don't know if that is an old wives' tale.
Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.