cognitive issues

I have noticed some slips in the way my brain is working. But, lately they seem to be bigger slips than the ones before.  I have been so fatigued lately and today my right leg started to feel heavy and drag again.  But, it is the mind that has me worried the most. I find myself doing things wrong a lot. I guess that I am lucky to be catching my slips.  On my lunch hour today tho, I was driving and cut someone off in traffic. I didn't do it on purpose. I saw the vehicle and thought to myself I need to wait, but my foot went down and my body did just what it wanted to.  That worries me. Maybe i shouldn't be driving at all.  I also find that my typing skills are deteriorating.  I used to be pretty proficient, but now am all over the place with typing. Letters pop in that I don't even know how my finger could hit that key as a mistake.  I just feel like there is a big disconnect from my brain to my body.  What I used to just do without even thinking almost, now takes full concentration. 
I hope that the docs figure out what is going on with me.  I am praying that October 25 will be a day that I get some answers!