At first she did, now she wants wait.. I don't know why...
Because she won't say or you haven't asked? You maybe aren't having the in-depth discussions about it that you should.
Have you asked her why? Like in a comfortable setting while she is in a good mood?
Also, sometimes just backing off can help. She might feel pressured or have fears about it. Then boom, one day she says lets do it on her own. (I am a guy so my advice may be bunk)
But dont let the disagreement tear you apart. Be patient.