39 weeks and not feeling baby move

I got checked Tuesday and I'm 2 cm dilated and lost my mucus plug yesterday morning and this morning more of it. However I haven't felt any movements. I bounce on my birth ball and get tightening which I think is just Braxton hicks contractions. Sometimes I feel like i barely feel her move but it just worries me because she used to be SO active and I'm not sure if I've felt her move at all the past two days. Anybody else experience this? Does the baby get less active when your ready to give birth? I know that told me to come in if I notice any change in movements but I don't want to waste a trip but I also don't want anything to be wrong with me baby. :/ I'm scared and don't know what to do! Maybe I'm overreacting.