http://www.askdrsears.com/html/2/T026400.asp
i hope that link works and gives you the information you need.
since i am scared of the formula industry, i encourage you to keep breastfeeding.
however, if you feel you sincerely cannot or dont want to, make sure you check with your doctor about the brand he recommends, and keep an eye on your daughter to be sure it is the right kind. some babies get really constipated on certain brands, so dont feel forced into one or another...
yes, your daughter may start acting up because of this weaning. she will come through it just fine im sure as many other children have also come through. make sure that when you are home and spending time with her, that it is real quality time - that might help ease her transition to dropping 2 daytime nursings. nursing is about more than breastfeeding, it is about closeness and love. so the more closeness and love you can give her while doing other things; reading books, etc, the easier it should make it for her.
it is WONDERFUL that you can work part time and you have had so much time off from work! that is fantastic! i really enjoy hearing about mothers who have put family first, as so many where i live dont. whatever decision you make, it will be right for you and your family and that is all that matters.
however, 2 more months isnt that long, you will avoid the hassle of formula, and the transition from breastmilk to (chocolate) milk will be smoother, and there wont be that attachment to the bottle... you dont want that!
is your daughter drinking from a sippy cup? i encourage you to give her other drinks (juice, water) in a sippy cup instead of a bottle. if you do choose to formula feed, remember that most children REQUIRE an extra cup of water or juice a day to keep the more concentrated formula from constipating them. i have a child in my day care who is 8 months old and has been on formula for 4-5 months, and has been struggling with constipation all the while because they didnt give him that extra water during the day. now that i have supported them to give him juice and water in a sippy cup, his constipation is finally going away. so remember that as an important factor in formula feeding.
something else that might help, do you have a sling? i HIGHLY recommend the maya wrap as it is the best one i have tried. see if the person caring for her during the day will use it with her. having more closeness during the day will hopefully replace a missing feeding.
are you able to go to see her or have someone bring her to you during your lunch time ? ? that would be a GREAT opportunity for nursing.
if you have any more questions, dont hesitate to ask.