Bugs and stupid errors

Hello guys, i'm making a new style of template, so I'm facing a lot of bugs and problems, follow my JsFiddle Code

https://jsfiddle.net/5vv9La62/

The questins are:

1. The icons are located on top, and not the center, how can I realocate them to the center?
2. I'm thinking my images, in specifically the first image jumbotron, we're wrong, pobably 'cause the fixed menu, but how can I fix that?
3. On the gallery the images aren't located on the center of the col-lg-12, how can I positionate them corectly?
4. The second jumbotron, the small jumbo, in the "make your appointment" unhappy are going wrong and aren't at the size that should be, how fix?
5. For the last one, in about me, I divided in two cols of 6, col-lg-6, but i want to center the position of text to the middle of the image, vertically. How do that?

If you guys, find something I do wrong please tell me hahaha, Thanks for all!