Starting with FA Cup game against Coventry Fan will also miss the trip to Northampton and the visit of Cheltenham.
With injuries to Gabbidon, Young and Hughes the last position we can afford to be short in is centre half.
Fan was involved in a scuffle with Kevin Rapley, there was pushing and referee Uriah Rennie was straight in with a red card for each player.
"I've told Fan I won't make any judgements until I see the video", Lawrence told the Echo. "If he has raised his arms I will be taking action"
Rhys Weston missed last weeks game v Bristol through suspension, Graham Kavanagh will miss the home game v Huddersfield next weekend after picking up his 5th yellow card of the season against Bristol City.