Hey Anni --
Moving a baby into their own room is nerve wracking for every mom. Your mind goes on and on with "what ifs" in the middle of the night! Since your baby is going to be on a different floor, I'd say invest in a fantastic video monitor so you can see every move. Here's an article to help get you started.
https://pregnant.thebump.com/new-mom-new-dad/baby-gear/articles/top-10-baby-monitors.aspx
Re: anni_t - moving baby to her own room
I had sort of an opposite experience, I couldn't sleep AT ALL when I could hear every grunt and gurgle going on. I thought she was waking up all the time and I had to be up all night prepared. What if you set an alarm for a certain time you could go check beyond the feeding times? Once you do it for a week or so I think you'll be more comf. Crank that monitor up and also I love the idea of the viddy monitor!
Good luck, your a wonderful mom (i know because you are worried)!