I think the best first step is to talk to your child's teachers and school. Be specific about your concerns, are you concerned she is not properly diagnosed, or are you mainly concerned that she is not getting the services she needs as deemed by her IEP? Check out our parent's guide to special education for some helpful info and strategies.
Schools have done a terrible job of teaching your daughter to read. This is common. Then they say it's the kid's fault, it's the parent's fault. But often the school is to blame. Often phonics will help.
You need to have the child tested to find out the exact problem.
(Ever since Look-say was introduced in 1931, the USA has produced millions of functionally illiterate children. Also a million so-called dyslexic children. If that term has been used about your child, see video.)