One should be very hesitant about self-diagnosing a child with dyslexia or dysgraphia, let alone differentially diagnosing between the two (unless one happens to be an assessment professional oneself, of course!--but even then, one should be cautious, as it is easy to lose objectivity as a parent). OTOH, I believe strongly in the intuition of involved parents that there is -something- going on. So if you feel there is some kind of obstacle to the free development/expression of your child's ability, I would agree that the first step is to pursue a comprehensive evaluation. If you already have such an evaluation in hand, I would follow-up with the evaluator regarding any questions you have with dyslexia/dysgraphia, and whether those are covered by your existing assessment data.