Here is a list of my symptoms...
7dp3dt: achy legs
8dp3dt: mild cramping
9dp3dt: napped in the pm
10dp3dt: slept in, very tired upon waking
11dp3dt: napped in pm, acne on face appears, shortness of breath, sore throat
12dp3dt: cramping in morning / afternoon, achy legs in pm, shortness of breath, sore throat, backache
13dp3dt: beta day, inner thighs sore like I did a bunch of leg lifts?!
16dp3dt: cramping in morning, watery cm
Did you ever see this that I posted a while back!?
https://www.nyufertilitycenter.org/ivf/embryo_transfer
It says you should be implanting now so that's what your cramping could be...