What do we realy know?

So Ive been thinking lately about the world and myself in general. It left me in quit a confused state, actually, it kept me in quit a confused state.
There is very little we know for sure.
Like we hear things on television and news every day, but are they honest? Do they just show us the things wich will influence us in some way? How can we know the info is true/is real ?
Well...we cant from sitting in our seat reading it. The only thing you can do to see, is to go and look for yourself. Now... abit hard to do actually.
But anyway, knowing that we cant know it for sure, we cannot judge it. Because if we do we might be judging something wich is wrong.

Also, when we go to the docter we expect him to know whats best for us. But does he realy? I mean yeah he studied for it but he did not invent the material wich he needs to study. Someone did that some time ago and some people are still doing this and integrating it into the school systems. But... how do we know they are honest and have no secret agenda? We dont! We cant know that for sure. So trusting the docter is just believing it, a believe system.

Now you can say: yeah but the docter cured me couple of times. Well... I have been sick to and cured without medicine. Does that mean that this goes for everyone ? No, just for me. Maybe ill once get sick, dont take medicine and die, who knows... all is possible in this crazy shit world.
And maybe we get sick because of other things, not bacteria etc... but maybe mental stuff, things of the mind? Could be, we cant know that. You can say: sure we can they investigated it. Yeah but can you trust those who investigate? No, you believe you can trust them, its just another believe. You believe the formulas and the tests and all the scientific info.

When I come to think of it, its all about believing.
You can realy use this methode of thinking about all kinds of subjects. You will find out that alot of things you do, are because you believe in it or trust it. It hasnt got much to do with anything else.