Re: new agressive behavior
Is your kitten an "only cat"? If so, then she is only playing with you like she would with her littermates. It is at this age, when they play fight and wrestle, honing their survival skills of hunting and territory control by fighting. However, when they play with littermates and mother-cats, they learn that their bites/claws HURT, because the victim will 'cry' and also because the victim can/will bite back and it HURTS, so they learn to play more gentle with each other.
Everytime your kitty hurts you, you need to "cry": Ow! Hey! Ouch! Owie, that hurts! ...and stop interacting with her. Re-direct her to other toys she CAN bite and claw, but you need to be patient and consistent in letting her know that behavior is unacceptable with humans, because she can damage us so easily.