Should I be worried?

So lately i have noticed changes in me.

I have a hard time remembering things. Like things I have just done or just seen or just put away.

Also, when I am talking I can never find the word i am trying to say. I know what the word means but I can't seem to find the word. And for simple words to like refrigerator for example.

I also have noticed i need captions when watching TV. Not because I can't hear it but for because I can't seem to understand clearly. And this is for shows I have watched for several years so I know I understand the actors.

Is this something to be worried about? Should I contact a doctor?

I am 22 years old so I don't know if that helps any.