Is there a reason you shot with f/2.2?
I mean, a very nice subject, but to me that aperture would be asking for trouble with this type of shot. I'd probably tend toward something like f/5.6, that way everything should fall nicely in the DOf!
So, maybe do some exercises, similar shots and lighting but mess with that aperture! Give it a try!
I know what it's like to shoot with a "fast" lens...I had a beloved 85mm f/1.2, and yeah, I messed around a bit with some close portraits, but I didn't want to come up with disappointing results!