Period-Like Cramps?

Stephanie • Naturally delivered our rainbow baby boy in July 2015 💙 and currently expecting our second due in October!
I have 30 days left and for the past few days have had period like cramps. Today I've had them all day and they are starting to go into my back. I'm a FTM and this just takes me back to my MC last summer. Is this normal the last month of pregnancy? Yesterday my stomach was upset all day so I thought maybe that was the cause but today they've been sticking around.