I could have written this. From the wrong diagnosis to not knowing where to start. You’re not alone.
I use an antidepressant but also supplement with B vitamins to help with the mood swings. After my diagnosis I got on Amazon and bought The Borderline Personality Disorder Survival Guide: Everything You Need to Know About Living with BPD https://www.amazon.com/dp/1572245077?ref=yo_pop_ma_swf and Mindfulness for Borderline Personality Disorder: Relieve Your Suffering Using the Core Skill of Dialectical Behavior Therapy https://www.amazon.com/dp/1608825655?ref=yo_pop_ma_swf- they have been incredible resources for me. DBT, a form of behavioral therapy has been proven to help with BPD - I’m not seeing a therapist but practicing mindfulness has helped me get through those intense anger episodes.
I hope this helps
I hope you give yourself credit for seeking help. That is a giant step and you're on the right path. I stumbled on this sub because I think my husband (who is also an addict/alcoholic) has BPD. I myself have struggled with depression but not for a few years now. Anyway he had attended rehab before we met and shared with me the most helpful resource. It's a massive book called The Feeling Good Handbook. Since you mentioned waiting to see a Cognitive behavioral therapist I think the book would be a great way for you to start changing some of your negative thinking patterns. It is a CBT manual, essentially. Keep moving forward, you have bright days ahead!