Questioning if I Have Bipolar Disorder or Borderline Personality Disorder

i have been diagnosed with bipolar disorder and for the longest time (like 5 years) i’ve been questioning wether or not i have BPD or some kind of other condition also, i’ve dismissed this idea many times but recently i’ve been genuinely questioning it. most of my symptoms line up with bipolar but there’s a lot of symptoms that don’t really have to do with bipolar. it could be just my ptsd or my medications that are not working properly but it feels more than that, even when i’m not having an episode i rarely feel actually stable and i always have this feeling like something is missing and i am empty, i have very complicated attachment issues that would take paragraphs to actually go into detail about, my moods are constantly up and down everyday and then i’ll have episodes of mania and depression on top of that. there are a LOT more reasons i feel it may be something more like bpd or something else. i just wanted to ask people who have bipolar and borderline what they think and what their experience is like having both to get an outside perspective ( i don’t have a psychiatrist yet)