@st3llar To find out which one you truly are, you should get an accurate natal chart done. My cousin has the same birthday as you and also thought she was a Cancer. However, her natal chart, based on exact time of birth, showed she is a Gemini. So that's what she now says. Personally, if that date was my birthday and I didn't have my birth chart done, I would just say I'm a Gemini-Cancer cusp, but to each their own 🙂