As has been stated, only you hold that particular answer. However, I've heard it said that if you're asking the question, then there is a good chance you are. Gender identity is a spectrum, and people who fall at the end where their gender identity and biological sex are in complete union, rarely question the union. When you're elsewhere on the spectrum, when there is mismatch between gender and sex, you are by definition trans*. And we are the people that usually have to question the mismatch.
Where are you on the spectrum, how can you address the mismatch, what does it mean for you? These are harder, more complex questions, but you can only start to working on them after answering the first.