Miscarriage fears

So I made the mistake of looking up the signs of a miscarriage and I've scared myself. This is my first baby and I don't have an appointment until the 25th. The only signs that could be even remotely considered something from a miscarriage are the cramping and back ache I've had. Both are intermittent and feel like period symptoms. It's not very painful, just uncomfortable. I'm making myself crazy. Are there any other definite signs of a miscarriage that I can use to ease my fears?