boomba
i am probably no help as we are no co-sleepers and this was because i found when DD was baotu 3 months that we woke her more than she woke us and she wouldnt have a solid sleep.
So we put her into her own cot. even now if she wakes at 3am and we bring her into our bed she thinks it is just play time as she is close to us and not sleep time...

i cant really offer any help on the cosleep situatoin but take comfort that not all subsequent children are the same, and i you are a wonderful mummy!