Is my brain is ok ?

I find myself very easy to be distracted. My mind is always dancing with thought . Sometimes the thought run wild makes me very emotional cause me can not focus to do anything. I find it difficult to concentrate for a long time. I struggle in doing math too. I can't imagine and remember number to make calculate. For example 17 + 25 is hard for me to calculate in my mind too. I have been like this for 2 years and I thought that was normal until now.