This was a very vague and poor description. When does it lag, what are your frames, which server seemed to be causing the lag, and did you lag when you began combat, tried running, moved too fast, etc. May i also mention that every server lags, more or less for others, depending on timezones. I personally tend to lag at about 5am-10am, which is ok for me, seeing as i live in the UK... Perhaps try pin-pointing the times in which you lag the most, and avoid being online at that time.