Umm. Drama is normal in puberty and adolescence.
There is no blood test or other definitive test for bipolar.
Bipolar is pretty unusual in young kids. It involves more than drama. Clear cycling between up and down. Mania. Depression. Sleep problems. Language changes.
Educate yourself if you think this could be a concern:
NAMI has a good website and info and classes for parents and other family members
NIMH website is a a highly reliable source for all kinds of Mental Illnesses --
https://www.nimh.nih.gov/health/publications/bipolar-disorder-in-children-and-teens-qf-15-6380/index.shtml
The book, "The Bipolar Child" by the Papolos' is consider one of the early comprehensive books diagnosis.
http://bipolarchild.com