Freaking out a bit.

Kashia • My name is Kashia I am 28 I have an amazing fiancee his name is Nathan Mccormick it's his first baby as well as our first baby together
I will be 32 weeks tomorrow an I feel like im about to start my period. I have cramps in my belly an my back. Baby is moving.. What is it? Is it normal? When I lay down I dnt feel it but once im up an moving I start feeling REALLY crampy..