If there is one thing I have learned throught this its never react immediatley . never jump to conclusions . She is still not 100% sure , she will throw these bumps and little tests out there , and I am sure it is not concious just her own doubts spooking her. Reacting and changing in haste can cause a backslide.
You have of course figured this out but it will not hurt to reinforce it to others who come here to read.
Pitty about the No Sex though , I am sure this will not be permanent. She is just pulling back a bit , which is to be expected from time to time.