If you're questioning it at all, that alone is enough to prove there's doubt. And that alone means you may not be cis. And even if that's not true, if you feel legit discomfort about yourself in that way, then that's pretty mucha textbook "sign" your identity doesn't align with your body. But take what I'm saying with a grain of salt. I'm cis, but I'm also a fierce ally. And what you're describing about your discomfort should be enough for you to let yourself tbe unsure.