is placenta taking over?

Vicki
I've noticed that the last few days I've had my symptoms subside a bit. I'm 7w3d today. I was freaking out because I thought something was wrong but another <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> that I have said that the placenta is starting to take over and that will ease my hormones. 
Am I the only one feeling this?!😕