You have Chiron (your wounds) in Gemini (thinking, knowledge, learning). I encourage you to look this aspect up.
I, too, am from the "Chiron in Gemini" generation, and the theory is that we have wounds associated to the Gemini part of our personality (thinking, ideas) and therefore, that aspect needs to be healed (we need to learn that we are, in fact, smart!)
I am the same way, and can highly relate with you. But as I am getting older, I am gaining better confidence.
Please look into this aspect; I think it will make some sense to you...
P.S. Other indicators of intelligence would be Air signs (which you have many) or Uranus aspects (Uranus can make you "bright" or "genius" when conjunct or in good harmony with personal planets- you'll need to look into it though, I'm not an expert...) Earth signs are also smart (in a practical way, as opposed to Air which is intellectual). Really, everyone's smart, but it's all different...
