Movement

So I know it is normal not to feel movement until further on, but I have days of super strong movement and then days where I don't even notice if they've moved at all. This is my second pregnancy and I don't remember my daughter being like this. Once I started feeling her, that was it. I felt her all the time. But this time, I will have days where I can't remember if I've felt anything. It's really freaking me out. I wasn't told I had an anterior placenta and everyone says you're *supposed* to feel second and subsequent babies more, so I just don't understand. I'm 20&3 today.