Hey Emma27, your DS sounds exactly like my DD - she is now 11 mths and still feeds to sleep! During the day she won't go to sleep without the breast or being in the car, but at night she sometimes prefers not to fall asleep while feeding - she just cuddles up and falls asleep. She started doing that when she was about 8mths old.
That prob doesn't help with your work sitcho but just wanted you to know youre not the only one