So many questions, so few answers

I am a curious person by nature. I am a seeker. I ask a lot of questions.
And if I don't find a very specific answer to my questions, I get extremely frustrated.
Or if I think I found an answer, and then I find another one that seems to contradict it, I get even more frustrated.
Which is why lately, with matters of my faith, I have been consistently frustrated.
I don't understand why denominations and doctrines matter so much! Whenever I am asked about my denominated, I respond with "nondenominational"...because I just don't think it should matter so much. And where did all of these doctrines and interpretations of the Bible ad Christianity come from anyway? And what makes one right and not the other? Lately, I have been stuck between two different doctrines, and no matter which way I look at it, one ALWAYS seems to contradict the other! So which one is right??
I've been asking all the "why" and "how" questions over the past couple of months. For over a year now I've kept all of this to myself, thinking that people would see me as a "bad Christian" if they knew how much I was questioning. But it started getting harder and harder for me to deal with, and now it's taking a toll. So I've started seeking explanations.
I believe that every story told in the Bible really happened. I definitely believe in God, and I can see Him at work in people all around me! But then sometimes I don't see Him at work in people...and I wonder why. I don't see Him at work in ME...and I wonder why.
And it doesn't stop there. Those are questions that EVERYONE asks at some point. But I've gotten to the point where everything I hear, I wonder if it's truth (and what if it's not?)...I wonder if it's interpreted the right way (and what if it's not?)...I wonder if it's actually for me (and what if it's not?)...I wonder if I should trust the person I am listening to (and what if I can't?)...and it goes on and on and on...
I've been told that it's okay to ask questions. And I've been told that the doubt I face is exactly what Satan wants and it's something I can choose to not listen to.
So much easier said than done! And yet people have done it! People all around me are overcoming their doubt and they still trust in God fully! So how do they do that? And what's preventing me from that?
There's so much more I could say but we'd be here forever.