Hi,
I got cramps early on in both my pregnancies, braxton hicks normally don't occur until near the end. I think that your body is streching in weird but wonderful ways and your muscles are finding it hard to cope with the added weight of your baby.
I was told that it was common to get cramps that run across your belly or to one side. Mine felt like mild period pain and streched across my belly dominating the right side.
I would mention it at your next check up, and if it is occuring regulary make an appointment to get checked. It's always better to be safe than sorry.

I'm pretty sure it's normal.

Best of luck!
Snoopea (Kelly)