I had the jab just over 2 weeks ago on the recommendation of my GP (because I had bad chest problems last winter).
We got told not to TTC for 6 weeks after receiving it.
If you don't need it before, I suggest you wait. I don't know what it's like in other states but we were told that in Vic, it's free for mothers & fathers of newborns (a friend of mine had it just last month). Wasn't a cheap one to have to pay for.

Hugs