Sending lots and lots of hugs & prayers to you and your baby. She will do great. I went to target and purchased a 5 pack of onesies for $8.99 and my little guy was 4.4 lbs and wore the 0-3 mos size because our Target didn't have the premie size. Be sure to put them on her upside down so they snap at the top (on her back) and that way she can't bite at the snaps and it is easier for you to take them on & off.
Keep us posted on how she is doing.....