33 weeks pregnant, baby isnt moving much!?

I'm 33 weeks pregnant and I still feel my daughter move everday but it is a lot less than usual and instead of feeling those hard kicks n punches its more like squirming and just moving. Sometimes it feels like kicks but not as strong. Is she ok? What is a non stress test and should I get one? Sometimes I don't feel her move for hours. Is that normal? Can the doctor tell how much she weighs witgout a sonogram cuz my insurance won't cover anymore sonograms. I'm freaking out cuz she's almost here n I feel like my belly needs to get bigger. Will I have another big belly growth spurt? Am I nuts? Help! Thank u.