Is BPD commonly misdiagnosed with MDD?

Hey guys. To keep a long story short, after being hospitalised after a suicide attempt in January of 2019, I was immediately diagnosed with MDD after a brief interview with a psychiatrist, and put on antidepressants. For many years I knew something was wrong in terms of my mental health, and depression seemed to fit the bill with regards to the thoughts, feelings and behaviours I was experiencing/exhibiting - as a child I remember going through periods of time when I felt empty and odd, and I was about 8 so I told my parents I felt “bad and sad” I also remember thinking, at this age “it would be fine if I died” “no one would care if I died right now” etc. I never questioned if MDD was the wrong diagnosis because the antidepressants worked wonders - I barely had suicidal thoughts anymore and daily tasks were easy to tackle, I didn’t feel physically tired anymore, etc. I also started going to therapy which helped a little bit, but the therapist was kinda whack so I’m looking for a new one right now, not really relevant but anyway. The point is, I didn’t really question anything because my functioning wasn’t impacted significantly anymore.

However, recently it came to my attention that the psychiatrist I go to is often too quick to make diagnoses, and misdiagnoses people sometimes. The case that stuck out to me was a girl who had been hospitalised like me after a suicide attempt - and same thing, after being interviewed briefly by this doctor, she was told she had MDD etc. Later, she said that she went to another psychologist and found out that she actually had BPD.

After realising that I have a very unstable sense of self, my moods are changing constantly throughout the day, that I have unstable &amp; intense  relationships, I have shifting views of the people in my life, that I’ve had suicidal tendencies and attempts throughout the years and I lash out angrily after even a minor negative event, (I know Reddit isn’t a substitute for professional help, I’m listing these for more of an understanding) I can’t help but question if I’ve been misdiagnosed. However, I am against the idea of self-diagnosing so I am in no way trying to do that. I’m definitely gonna go to another psychiatrist and another therapist so they can assess me accordingly. But after doing a lot of research, I am worried that I’ve been misdiagnosed which brings me to my issue - if the antidepressants I’m on are allowing me to function relatively well, I barely have suicidal thoughts anymore and I am stable for the most part - does it really *matter* if I have been misdiagnosed? I’m not sure if any of this has made sense, but if anyone has some advice, or similar experiences, I’d really appreciate any input. Thank you if you’ve read this far :)