Considering my DX is wrong (seeking advice)

I’ve been delving into my symptoms, keeping track of my mood and anger. I think my diagnosis of schizoaffective may be wrong. My father is diagnosed with BPD, his mother with Bipolar 2. I’m currently diagnosed with Schizoaffective Bipolar type, CPTSD, and many other things I won’t go into. I’ve made the realisation that I have never had psychosis separate from mood symptoms, which is a requirement for a SZA. But I could be confusing depressive mood symptoms with negative symptoms. I personally think I may also be borderline like my father, but I hate to be the kind of person to self diagnose. I don’t think it’s WRONG to do that, if you have the research and evidence to back it up. But I’m not a psychiatrist, and i dont know if it’s right of me to even say it’s a possibility. I know that SZA and BPD can be comorbid. I don’t think it’s both, but I’m not a professional. Has anyone ever felt their diagnosis didn’t fit them after a while? I was so sure in the beginning, but I’m really questioning it now.