I'm still nursing a 2 year old. My philosophy is, if you don't have a really good reason to stop, go ahead and nurse her. If she's not ready to quit, you'll have a huge fight on your hands and it will be a miserable experience for both of you.
My first weaned rather easily at 17 months, but my second is just not there yet.
Another thing I've noticed-- once you wean them (or really cut back), they get really sick. My first never had an ear infection until she weaned. Then she got three in a row. :(
Here's some reading on the benefits of breastfeeding toddlers:
One thing I can assure you-- it's temporary. Before you know it this time will be over, so enjoy it while it lasts. If you're still intent on weaning, try again in a couple of months and see how she reacts. Good luck! :)
edited to add: I just read your "a little about me". I would try getting someone else to offer your daughter diluted juice or water in a sippy cup. I bet your daycare provider will be able to get her to drink a little, and even if it's very little, she will make up for it by nursing after you get home from work.