This is an autobiographical novel, a novel based loosely on your own autobiography, but without guarantees of fidelity to actual events. It's one of the most famous and successful formats. It is generally considered as a sub-genre of the novel, and filed under fiction. Famous autobiographical novels include David Copperfield (Dickens), Portrait of the Artist as a Young Man (Joyce), To Kill a Mockingbird (Lee), and Invisible Man (Ellison).
If it isn't long enough for a novel, it still falls under the category autobiographical fiction, which is not the same as "fictional autobiography." The former is fiction inspired by real events, the latter is fiction presented in the form of an autobiography (similar to a mockumentary).
Most publishers don't distinguish between fiction and autobiographical fiction (unless there's a danger someone will sue you for libel!). And most readers who care will assume all your fiction is autobiographical anyway. The general rule of thumb is to not sell something as "non-fiction," "memoir" or "autobiography" unless it's 100% true. Anything less than 100% true is "fiction."