A diagnosis isn't based around one symptom. There could be one of over a hundred reasons why you struggle to process information when you're reading. What you need to do is give us more information about a range of symptoms that have had a negative impact on your life. Only then can the picture become clearer.
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Prof-Diagnosed: Aspergers Syndrome (I still call it that!), Dyspraxia, Dysgraphia
Self-diagnosed: ADHD-PI, Social Anxiety, Depression
Treatment: 5-HTP, Ginkgo Biloba, Omega-3, Pro-Biotics, Multi Vitamin, Magnesium