little cramping & some spotting, should I be worried?

This is my second time being pregnant, first time I miscarried & I'm praying I don't this time. I bring have little cramps here & there which I read was normal because your body is changing, & just started a little spotting today. Not red blood but just a little brown. Haven't been to the doctors yet. So I'm trying to stay positive about it. But I'm a little worried.