Class B shelf = 3000 My altitude = 3400 For about 3nm in the most outer ring of B, for less than a minute. Reason for bust = distracted looking at approach plate (stupid) I was talking to Class D tower the whole time, and at that moment, inbound for pattern work then landing. Did 3 laps in traffic pattern before full stop - tower never said anything to me. I have no idea whether anyone is chasing me down or not. I filed NASA ASRS. Any other actions I should take? Thoughts?