Molly, I'd agree with Peachy and say have one, after everything they've told me about IUGR and pre-eclampsia, plus having placental abruption myself at 32 weeks, which they didnt spot until it was very nearly too late(I'd lost 8pints of blood internally by the time they operated).
I can't remember who it is that sleeps sidecar tbh, all I remember was that they said they get the benefits from co-sleeping; mothers breathing regulating babies, easy to get to baby, REALLY good for breastfeeding, you don't even need to get out of bed! and then the benefits of baby having their own cot; can do a proper bedtime routine (bath, feed, bed) without having to go to bed yourself, baby is used to sleeping in a cot so there aren't hassles when you want to stop co-sleeping, no worries about squashing it etc.
I really think it's the best possible compromise, you may have to start a thread about it to find out more thoguh, cos I really cant remember when/where or who I discussed it with!! (It may have been TheUrbanDryad?)