High amplitude slow waves and spikes (mixed focus) in the right centroparietal and midtemporal area on my eeg what does it mean ?

In the absence of a complete history, exam, patient age and other factors little can be said. When you post on this site the more specific information you provide the more likely a reasoned answer can be offered. You are welcome to start over.

Dr Ferguson raises a logical point, as an EEG is a study to rule in or rule out clinical diagnoses. The EEG data here may show focal irritation, but correlation with clinical symptoms provides helpful significance. Certainly, discuss outcomes with your neurologist.