I had the same problem. Constantly crying cuz it hurt so bad. When we went for ultrasound we were told it's because baby's head is in pelvis and not moving outta it.

your body is just getting ready for labor

Im 33 weeks as well. From what I've read from this point on it is completely normal to feel a decrease in fetal movement because there is less and less room available for them to move around. I think you're just fine but I'm no doctor, if you're super concerned just give yours a call or the hospital since it's the weekend idk if your doctor would be available. I think you should be okay though!