Hi there.
If you're concerned about your mental health, it's always best to discuss it with your doctor or a mental health professional such as a therapist, psychologist or psychiatrist. If you are underage, speaking with your family doctor may be the easiest first point of contact, especially if you don't have a trusted adult to discuss this with.
Here are some great resources that help define what bipolar may look like for some individuals:
Biopolar Disorder | About Kids Health
Bipolar Disorder | National Alliance on Mental Health
If you feel like you'd like to explore assessment or speak with a professional about your concerns, here's a great list to refer to if you are located in the United States:
https://www.everydayhealth.com/bipol...ide/resources/