With DS I tucked a sheet tightly under the mattress, laid him underneath the sheet then laid myself over the non-tucked end (does that make sense?). So in other words the sheet was tucked in on both sides - under the mattress on the right, and under my body on the left, with DS inside. I also laid pillows on the floor just in case...but thankfully nothing ever happened! (by the way, we have a very low bed)
DD is 3 months old and I'm sure there must be a better way. We can't push the bed against a wall in our room owing to the odd shape of the room. I've set up a BabyDan bed guard, which, IIRC, is meant for children aged 18 mos plus. Does anyone know why? I've stuffed a folded blanket in the miniscule gap between the bed and the guard, in case that might pose a limb-trapping hazard. Apart from that I can't think why it could be a problem, and we certainly used it with DS for a while when he was under a year old.
Would gratefully appreciate thoughts or suggestions of how else I can keep DD safe!