I think the doctor is just making sure that whatever caused her levels to spike doesn't reel its ugly head again before he puts her back on her previous dose. Her own health must come before anything.
Personally, I only saw noticeable changes after 5/6 months hrt. My boobs had grown before then but nothing seemed to be going on with my ugly male face, but suddenly one day I caught myself in the mirror and was quietly surprised and - if im honest - ecstatic! She just needs a little patience and I'm sure she'll start noticing the changes
As to making her feel better, whenever you are out, I would walk tall and proud, arm in arm, to relay to her that a) you are not ashamed b) she is beautiful and c) you
love her.
For what its worth, I think you are amazing to remain with your loved one, through thick and thin and everything in between. You are
not failing as a wife. Get that silly notion out of your head

! She depends on your support and so far you are doing an outstanding job
x