actually 3 questions.

first one is:

do all therapists really go before a board of their colleagues and discuss individuals they have sessions with, at least american ones?
This is much more likely to happen in a hospital setting. Often, because the patient is there 24 hours, there are a team of people treating the patient. So it's necessary to make sure everyone is on the same page with treatment. In an outpatient setting, a formal meeting like this would be unusual. However, professionals do sometimes seek the advice of their colleagues in a more informal way.
second is:

im starting to question if i really have this disorder. i was dx'd at 15. its not that i suspect i dont. its that i dont even know. i dont know what to think. im severely confused.
It is possible that a diagnosis you were given at 15 is no longer correct. I think it's perfectly okay to question this. You have a right to understand your diagnosis, and you should ask your P-Doc or T any time you don't understand a part of your care.

third is:

if i go to a psychiatrist to check my Dx. can i refuse their meds? will they put me away if i do?
last time i saw psychiatrist was literally a year ago nearly this week. and they put as schizoaffective
but i fear its just cause i said my past standing Dx was schizoaffective.