Focus issue. I should do about them?

Hello Doctor, I have been having quite a lot of difficulty focusing for the past several days. For example, when I meet a new person, I can see and interact with them at the time, but when I meet them again after a few days, I sometimes cannot recognize their face or remember who they are. I am also finding it difficult to concentrate on almost anything. It feels like my mind is constantly occupied with thoughts, and sometimes I feel as if there is a kind of dizziness or something moving/going on in my head. Because of this, I am concerned that there might be an underlying issue. Could you please advise me on what might be causing these symptoms and what I should do about them? Please let me know if I should come in for a consultation or get any tests done.