Blurry reading not eye sight?

For the longest time I have had a hard time reading because text is normally little blurry and I can get headaches when trying to read. I have seen a few eye doctors and they stated my eye sight was perfectly fine, almost at 20/20 and that I should have no problem with this. When younger I had gone though a few tests related to learning problems and i was found to suffer from dyslexia. Normally just lived with it but now getting curious why and if the dyslexia may cause this? Also a bad speller and suffer heavily with learning foreign languages, even though im very good with math, fiance and computers way beyond my peers. I know y'all are not doctors but cant seem to find much online relating to this issue. Any body who knows a lot about dyslexia could help me understand this and maybe give some tips overcome this.

Thank yall :)