help? moving into own bedroom

I'm a first time mum, currently 22 weeks 4 days pregnant with our second princess. Our first daughter is 11 months - 1 years old in 19 days; she has been sleeping in her cot/crib in our room since she was born, we were originally going to  put her in her own bedroom at around 9 months but we moved house and I didn't feel she or I were ready.

My SO has suggested we move her into her own room as we've recently finished organising and decorating in there. But honestly the idea terrifies me, what if I don't wake up as shes in another room? what if the baby monitor doesn't work? what if she needs me and I can't hear her?

I wake up every other hour, even when shes sleeping and pier into her cot/crib to check shes okay - i wouldn't be able to do that if shes in another room and walking into her room might wake her (shes a light sleeper) i know theres baby monitors but of course being in the room is always nicer and makes me feel more at ease.

I'm hoping im not the only mum who has felt like this.... how did you come around to the thought? what are your suggestions to make myself more comfortable?

Please no mean comments.....