Oh Kaylee - you poor thing.

I guess if it were me in your situation I would be a little skeptical too - I think that's only natural. I don't know much about the protocol regarding autopsy, but if it were me, I guess I would be seeking a way to have an autopsy done by an independent 3rd party.
However, I would advise against doing anything which is going to cause you more stress and heartache.
I can only pray that you receive the truth that you are looking for and that your heart heals with time.

XX