S.B.
You should request an IEP evaluation immediately, in writing. This starts a clock for the school district to determine if your child is eligible for special education services. Most charter schools do not have a full range of special ed services, but may contract with your public school district to provide some services. You will have to work with the school around that.
You will find lots of info on both of these disorders at www.ldonline.com and you will find info on the IEP and special ed process at www.wrightslaw.com .
I'm an educational advocate in Denver, CO - I help families negotiate the IEP process. You can write to me directly if you have questions. I also have a daughter with learning disabilities and dysgraphia.
take care, S.