Suddenly active baby

I'm 39 weeks and my baby has kicked me and had hiccups all day. Usually it's at certain times of the day or when I'm at rest but today he has not stopped moving. Is this normal? I've had more Braxton hicks too, they're so uncomfortable that I have to straighten my torso, if I slouch at all everything feels squished. Did you notice a difference in your baby's movements before labor