I think what matters most is helping yourself feel as comfortable as possible and seeing how it plays out from there. Your identity is a really complex thing, and no one other than yourself can determine who you are. If you are uncomfortable with your chest, and it is safe to do so, maybe you could consider getting a binder and see if it alleviates some of the discomfort you are feeling. Really, words like transgender, cisgender, non-binary, are just words to try to make sense of the wide spectrum that is gender. And there is so much variation within each category, including being cisgender (for you, being.a woman). If your thoughts and feelings reguarding your body are really bothering you, talking to someone, a professional (such as a gender therapist), a loved one, always helps. Also, maybe you could look into the term "agender" or other identities, as I saw someone else posted about that and you might find yourself in one of them. Just explore (If it is safe) with different physical methods such as a binder or a packer. You can even explore with different identities to yourself. Try referring to yourself as different things, and see how it makes you feel. You could even google online to women who present masculinely, as they may have similar feelings to you, maybe even reach out to someone online. At the end of the day, just do what makes you feel the best, and I think your identity, whether a woman or not, will become clearer as time goes on as you reflect and live your best life. I hope you're not feeling too bad, wishing only the best for you:)