Hey @Sunnyside226 ,
Sorry the helpline didn't really help. Despite that, good on you for reaching out. That in itself takes a lot of strength.
With me, I didn't yell at people because I was really low. I yelled, raged and screamed at people because I was angry and frustrated. I struggled to regulate my emotions and therefore I lashed out - physically too (I'm sorry to say). I'm not proud of it.
Any yes, I easily went from 0-100 in a matter of seconds. That was part of the emotional dysregulation.
And running really fast? Yes. I've done that. And it wasn't safe. I was running on the emotional brain and ran into many risky situations.
But remember, I have BPD - not bipolar.
Also, as a 13 year old, your kid may just be showing the signs of being a teenager. It's very similar. Their brains go a little wild because of neural pruning.