Hi R.,
our first child especially had a hard time getting used to going to school. It took so much energy from his father and me, it was a very hard time. Part of it was that i was also ambivalent with the school, i think today. Anyway, he never loved it there, but he did adjust, it took a lot longer than two months, though.
Here are a few things that temporarily helped:
* the picture book "The kissing hand" about a little raccoon being scared to leave for school. To this day we give kissing hands, if a parting is hard.
* a good luck token (we made a small wooden bear) with a picture of me and his little sister glued to it (he picked the photo, and he used to have the bear in his pocket).
* being understanding how hard this is, without dramatising it or making it bigger (sound easy, huh ;-) -- When i noticed that our son was getting worn out through the week, i would sometimes ask him if he would like a day off (if i was able to organise it), and then i would give him a day off, and we would stay home together. I did not offer that in the morning for the same say, but rather i would say: "i can see this is really hard to go to school today. But today we need you to go, because we want to work. I can make time tomorrow, and you can have a day off tomorrow (or whenever other day). Would you like that?"
* A clear, loving, unhurried but brief good-bye ritual. My daughter loves to give a kiss and then run to her school window. I stop outside and we blow another kiss and smile and wave, and off i go. When they cling i gently make us follow the good bye routine, and try not to make it harder for anyone by lingering ambiguously. Good teachers are helpful here.
Lot's of people wanted me to see his difficulties as a battle of powers. But i do not think it was. Luckily his father and i agreed on that. To this day my son likes a lot of down time, and time by himself. Though he loves his school! He runs right in. We did pick the school carefully.
Good luck! This is not easy! Be easy on your daughter and yourself!
D.