Did a diagnosis of BPD make any difference in the treatment they received? Nothing seems to be helping her and I don't know if medical personal would take a different approach if she were properly diagnosed.
I just feel like my child is a completely different person these days. And it happened what seems like overnight.
I think a main question is- if they officially diagnosed BPD- would it lead to specific treatment that could be more effective?
Note- we are all lay people here with our own experiences, so these are not professional opionions. I think you know that but I wanted to make this disclaimer.
There isn't a specific medicine for BPD. Medicine can be used to help some associated symptoms. In the case of my BPD mother, she took medicine for anxiety- and so "anxiety" was the diagnosis on her chart. Her medical team was aware of her BPD, but as a diagnosis, it would not have changed the choice of medicine to treat her because there isn't a BPD medicine.
There are certain therapies that have helped pwBPD and other disorders. DBT is one of them. If there is a history of trauma, then EMDR helps with that. However, in a 15 year old, how much of her cognitive and emotional development at 15 to work with these therapies is a part of the decision. If there's a history of trauma, she may be too young for EMDR. So the benefit of having BPD on her chart may be lessened if she's too young for full participation in these therapies.
They may also feel she's too young for this diagnosis to be official on the chart, since she's still maturing. The therapists can be aware of it, without it being on her chart yet. Since she's young, they may be incorporating therapies into age appropriate approaches with her.
With a sudden change in her behavior, I assume they have looked for and ruled out other causes, medical, events that cause emotional trauma, bullying, abuse, and substances. This isn't to blame parents- even with good parenting and monitoring, kids today can be exposed to the internet, cyberbullying, through peers. Sometimes none of these are factors, but I assume they've looked at these to rule them out.
Since she is a minor, I also assume her treatment plan includes family therapy and meeting with you as parents. If BPD is being considered, you can go ahead and learn about it without having a definite diagnosis at this time. It can help to have your own personal therapist for support as you navigate this situation.