Sorry, you might not want to read more of my post - be prepared for the possibility that her sleep will get worse when you go back to work, as her day will have changed massively, and she will be apart from you.
Couple of suggestions - what happens if her cot is in a room with an adult sleeping in it? My horrendous sleeper slept better if we were in the same room, but not necess the same bed.
If she needs rocking to sleep, what happens if you stop with the rocking / cuddling ever so slightly earlier? So, rather than waiting for her to be in a deep sleep, stop the rocking / cuddles just as she's dropping off, but stay with her til she is deeply asleep, and then slowly reduce the time you rock, and then the time you stay?
If you want to try and get it sorted in under 2 weeks, I think CC might be the only way - but DH insisted we tried it with DS1, and it didn't work! Some kids just don't want to sleep! Softer methods might help longer term, and also might reduce night wakings.
Good Luck. I went back on ML with no 2 as DS1's sleep was soo bad. DS2, thankfully is a different kettle of fish, and much easier to settle. Infact newborn DS2 slept better than his 2 yr old big brother!