3 years ago In July/august 2019 I had ONE session with a psychiatrist and he diagnosed me with bipolar disorder. is that normal? Come to think of it, I have no clue what type… I’ve seen another psychiatrist since then and he hasn’t even asked what type so I never really thought about it. I’ve been on 5 medications as all have made me gain weight. My mood has always been stable. The side effects have just been awful which is why I’ve had to change. 

My question is. How did the psychiatrist know In one short session that I have bipolar disorder and that I need to be on olanzapine at the time ( it made me put on 25kg and made me depressed)… I had had some symptoms but What if  Ive been misdiagnosed and I’ve been on wrong meds that have significantly impacted my health? What do I do?