Job troubles are keeping me stressed. Any advice?

I is a secetare for a majer law ferm in Dallas tex and latly my job is got me stress out. my boss always yellin at em that i make to many mistaks and have truble unerstanding hims d. what shuld i do and shuld i talk at him and tell him i desurve to be treeted wit respec or shuld i fine a new job.