Tasha,
May I suggest that you keep reminding yourself that you are there to perform a job, and that that is the only reason you are there. You are not there to compete with the other females.
In my view, the best way to improve your self image in this case is to do the best job you can do, and let the petty stuff related to your fellow female co-workers take care of itself. Let it go!
As a retired global director who managed literally hundreds of women over my career -- and with apologies to those very special professional women for whom this was not true -- I can tell you that the #1 thing that drives male supervisors nuts is this exact issue, i.e., insecure women who require constant attention and stroking in order to keep peace in the office, which drags down productivity and raises blood pressure, stress levels, etc.
Look -- You were hired because somebody felt you were the best-qualified to do a certain job in a certain position. So be the best you can be in that role, and save the competing with the other females for outside the office. By doing so, not only will you be part of making the company successful by being such a conscientious worker, but your self image should take a very positive hit knowing that are contributing and helping make the company successful.
As for the rest? Let it go ...
-wpf