What Causes Fatigue, Memory Issues And Disorientation?

I have been having several issues in the last few months. But the last few days I have extreme fatigue, my thinking is very slow sometimes things that I should absolutely know aren t coming to me. Sometimes they will come and sometimes they won t. I can be in the middle of talking to someone and totally forget what I was talking about before I am finished. Having trouble getting a deep breath. Makes me feel like I am suffocating. I recently found out that I have 5 nodules in my thyroid but my labs for thyroid were within normal range. The nuclear study did not show any cancer. I also have been choking a lot. That is probably because of small hiatal hernia and esophagus dismotility. ENT didn t find anything out of the ordinary when checked. Barium swallow showed the hiatal hernia and esophagus dismotility. Took prednisone several weeks back due to arms going numb. They are still going numb and now neck hurts where before it didn t hurt. I have degenerative disc disease and C4 C5 have spurring. Only medication I am taking is protonix and that seems to help with the bloating and reflux, and estrovent patch. Have had complete hysterectomy.