J.S.
The good news is you have another month to work on this before you go back to work. Some babies are fussier. My daughter preferred sleeping on me and sometimes i took that opportuhnity to catch a nap myself. So it isn't all bad.
Keep trying to put her down with some naps. She needs to get used to somewhere other than you. Keep it as close to being with mom as possible..same room, same background noise.
I think it was in the "no Cry sleep solution" or some sleeping book it said that babies aren't old enough to sleep well or in a pattern until 4 months old. So maybe it will just happen.