Inconsistancy about the time of going into Hiding?

[Inge]

No: HPFGUIDX 173220

Wrong time for this post, I guess, since I do not have the books at 
hand right now and can't look things up. Will post anyway and hope 
somebody can clear up if I'm mistaken or not :)

We've been told earlier (dont even remeber in which book) that Lily 
and James went into hiding only about a week (or few weeks?) before 
the actual attack took place.
But I'm certain that "somewhere" in DH it is described that they "have 
now been in hiding for some 3 months" (or close to that).

Am I wrong about that?

Inge