Bipolar Disorder Support Group
Bipolar disorder is not just a single disorder, but a category of mood disorders marked by periods of abnormally high energy and euphoria, often accompanied by bouts of clinical depression. This is the place to talk about your experience with bipolar disorder, learn from others' experiences, and find support.

But usually hypomania lasts days, weeks, months if untreated.
Are you on meds? If you are and that has reduced that kind of behaviour then that might indicate that yes, it is bipolar because the specific meds used to control it are actually controlling it.
We can't tell you if you have been misdiagnosed though. I would suggest you get a second opinion.
Big hug sweetie...xo