This is confusion

I don't know, maybe it's just me? But the God of the Old Testament and the God of the New Testament, are NOT the same God. Because in the OT, He changes his mind. More than once. And in the NT, God never actually does anything, it's all Jesus. So how exactly do these two different ideas of God work? Because if the Bible is literal, as most Christians believe, then the God of the OT can NOT be the God of the NT. And I would LOVE for someone to try and help me figure this out. To try and make this work for me. Because I want to believe, I really, really do!
*sigh*
Not knowing that what you've been told to believe all your life is true, sucks.
And it's scary, yet exciting at the same time. The thought that maybe everything I've ever known is not true. That perhaps the only reason that I've ever believed any of that is because I was too afraid to really think for myself.
And so now, I'm thinking for myself and starting to figure out what/if I believe is what I'm doing.
At current I would be hesitant to call myself a Christian. So what would I call myself?
That's a damn good question...