rok c

Hello, I was wondering if anyone can help me understand some things....I have never been fond of a lot of numbers but I have not been bad at them...I worked 9 years with code in the military and I was a great numbers sailor...exceptional with few era's...now I am a 42 year old woman and for the last year I have developed number and alpha dyslexia....it is quite severe and very scary...I am poet but do not like ot even write anymore b/c I keep reversing the letters...letters more than numbers actually...and last week in the gorcery store I said words in swapped positions.....is it normal to develop such a learning disorder at 41-42 yrs old? Please give me some feedback or let me know where I can do further research...thank you