I've definitely dealt with this on numerous occasions, and I've let it suck me into self-pity, depression, and worthlessness.
But I'm starting to distance myself from "cis" and "trans" differentiation on a personal level. Despite the importance of these terms in social, medical, and other public spheres, all they have done for me is cause a different rift in my being than the one that existed before I began to transition.
I'm a woman. My body, my mind, my spirit are all a woman's body, mind, and spirit because if I'm a woman and those are mine, they are part of this woman. Sure, I won't be able to have certain things a "cis" woman might have - or not, for some - but I have certain things a "cis" woman will never have. Those things don't disqualify me or designate my womanhood as subpar.
I know, pretty words that sound all hopeful and Pollyanna-ish. But words that are spoken, er, typed by someone who has dealt with the situation you find yourself in right now.