Do not rule out a learning disability just because your child is smart. Maybe if she has received such individual attention the first 3 grades it was just never noticed that she struggled in some areas because she actually got the attention she would need. Now that the extra attention is not there, the problem is shining thru.
I thought my son was very bright from an early age. He talked early, had a great vocabulary and clear speech in pre-school (one of the best in the class per his teachers), could put his older sisters puzzles together faster than she could, could do simple addition etc. He got to first grade and started word recognition and hit a brick wall. Despite tears and yelling from me to him...him to me...he could NOT do it. The teacher tried to tell me in a conference it was my fault because I was a working parent and did not spend the time working with him every night. (More tears from me)
At the advice of a very good friend of mine, I insisted the school check him for a learning disability. They tried to tell me they thought he was too smart for a learning disability. Once I finally went thru the legal channels to make them test him, turned out he had an IQ of 130is and a severe reading and spelling disability.
He is 17 now. With the help of the most fantastic special ed teacher, he has read at grade level with no extra help since 7th grade. His spelling is still horrible and probably always will be. Luckily he lives in this generation because I hear him asking Siri on his iphone "Siri...spell xxxx".