I have AF. I have exactly the same symptoms. AF affects the whole systems including neurotransmitters. I am much better now but still have not gotten my emotions back. I also do not have adrenaline rush when angry, for example. I just do not get angry anymore.
You need to do 4 point cortisol salivary test. It's less expensive than neurotransmitters. If you have AF, this explains all the symptoms.