Patience, patience, patience, Jules.
I'm at pretty much the same phase of HRT, that magical time where your mind feels almost completely female and yet your body is still mostly male, and yeah, it freaking sucks. I also really want to be able to see more changes, to look better in women's clothes, and yeah, I am also VERY afraid that certain things will never change.
But it's too early. Unfortunately, not everyone is an early-bloomer. In fact, from what I'm hearing from the mass populace here, there are a LOT of cases where someone pretty much doesn't notice any changes whatsoever until the 6-8 month mark, and some take even longer than that. But that doesn't mean that the changes will be any less significant once they finally do come.
I mean, basically we're in puberty again. And it's very tempting to get jealous of the girls who already have hips and full breasts early on. But it's just a matter of waiting. They will come.
Also, try focusing on the things that have changed rather than the things that haven't. That's what gets me through it, is realizing just how much more I like my body already, even though the changes have barely just begun. Feeling my soft skin always brings a smile to my face.