Decreased Fetal Movements.

I was laying in bed and had this weird feeling like I didn't even feel pregnant and I've noticed that she doesn't move as much anymore but was told that was normal in the last few weeks of pregnancy Since the baby is a lot bigger and doesn't have as much room to move but I can't even remember how long it's been since I felt her move, I drink some ice water and still nothing I'm gonna try eating some pizza and drinking more cold water, should I be worried?