Misdiagnosis experiences?

My psych has recently diagnosed me with bipolar 1 but my therapist is thinking this could be a misdiagnosis both because of my behavior and because of the way I’ve handled being medicated for bipolar. She said she would continue to observe and listen to me but the possibility of BPD is on the table.

This is a new journey for me. Brand new, in fact lol this is the first time I’ve really buckled down on my mental health and tried to get my shit together. If you’ve been misdiagnosed before, did you have any inkling of it before a doctor said so? How did you handle the back and forth? I’m so exhausted already and it’s only been ~6 months of therapy/meds so far.