Hello, I am experiencing the following: I am seeing worse

Patient: Hello, I am experiencing the following: I am seeing worse with one eye ( get’s worse over a period of time) along with problems with finding words and a weird feeling of the world along wit a headache on the right side of my head through the whole day for the last couple months and I get the feeling I am falling down sometimes alot more the last few weeks. my memory and my concentration is worse than before. I am an 18 year old male, could you tell me something about this?

Doctor: