I took my normal 3mg lunesta at 11:00 pm and at 3:30 am i accidentally took 2 more. what are likely affects?

Increased sleepiness: Taking a total of 5mg of Lunesta is likely to increase the side effects of the medication without improving your sleep. You are more likely to have the impulsivity, agitation, bizarre behavior, hallucinations, sense of being outside of yourself, depression, and even suicidal thoughts. Since you have already slept it off, it is unlikely there will be further effects.

As long as u: woke up, there may be some leftover sedation, which should wear off throughout the day. No driving for 24 hours. After that, you should be ok. Ensure this doesn't happen again.