Slimming world

Hi ladies! 
Have not long found out we're expecting baby number 2, I put on over 5 stone with my daughter and 9 months ago became a slimming world member having lost  4.5 Stone....Just wandered if anyone had stayed at slimming world during pregnancy and what results were. ( not worried about loosing any more but don't want massive gains!)
I'm incredibly scared of my weight going through the roof again! ( especially as wedding is booked 8 weeks after baba is due!) 
Any thoughts? X