concerned about my mental health

so recently, i constantly experience really bad mood swings and my best friend told me that she thinks i have bipolar personality traits but i know i’m not bipolar because there are serious symptoms to that that i don’t have. i just notice i can be really happy and in a good mood, then the next second i can be irritated as fuck wanted to fight somebody. or i can be depressed as shit but then become really upbeat. idk if i actually have a problem or if i’m just a complete mess that can’t change.