I think it's natural, once you have taken such a positive step in the direction of health, and seen the benefits, to start looking for other areas in your life that can be improved.
This is especially true if you still have unresolved issues. I think sleep and exercise are good places to look. (There is more to sleep than just getting "enough".) It depends on your symptoms, but people with good diets still might need some hormonal corrections, or body work, such as massage, before they feel their best, or any of a number of other therapies. I say, if you don't feel fantastic, don't rest until you find the solutions.
Of course, if you already feel great, and you feel you are obsessing when there would be little marginal benefit to more gains, then maybe there is something else going on, like something you don't want to face in your life that health pursuits provide a convenient distraction from. At the very least, even if it isn't a psychological maneuver, you could improve your life more by letting the rest go for now.