GaiusJulius175,
I assume it’s probably difficult in terms of paying for the service but if you could get access to a neuropsychologist who would test for various learning disorders you might be on a better path to tackling some of your issues. While ADD is a possibility there are other conditions out there. For instance, the fact that you experience social anxiety, have issues with math and science,learn better one-n-one, and have poor grammar skills yet seem to have a good verbal acuity, which I’m assuming because your posts are expressing your thoughts quite well despite the deficit in your grammatical expression (which on the whole isn’t really that bad compared to some posts I’ve seen here!).
So for starters here’s a link to Non-verbal Learning disorder ( not what it sounds like) – http://www.nldontheweb.org/nldentrylevelreading/nldcharacteristics.html.
Just curious if this resonates with you because some of what you describe sounds like a friend of mine’s son ( minus the drugs ) who went in for an ADD diagnosis and cam away with that instead. In hindsight it was so obvious.
If not…sorry & never mind… I just had too much coffee with my meds this morning 
Oh and almost forgot – in terms of finding your strength – Have you seen the online strength finder e-book and assessment.? It was done by the Gallop Poll people. I took this several years ago and it was quite interesting. http://strengths.gallup.com/110440/About-StrengthsFinder-20.aspx
Good luck in your journey to self discovery….
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