I'll say what I guarantee others with experience are thinking: I wouldn't be talking contest preps until you addressed a few things:
1- you've seemingly lowered your calories and I'm going to assume carbs because that's what a lot of inexperienced competitors and gym rats think you're supposed to do wn route to getting ripped. Unfortunately your metabolic rate seems to have adjusted, leaving you with a very slow metabolism, and a daily intake lower than most female competitors. This will take time and knowledge to address before you even start thinking about lowering calories.
2- macro wise, the 99% protein diet some
Newbs think they must follow basically sets you up to rely on protein breakdown in order to make the carbs your hard training muscles want. In most cases,
Trainers with a decent amount of muscle mass and who aren't excessively soft hAve a better insulin sensitivity than they realize. I can't tell you how many times I look at someone's current intake, double their carbs and lower their protein and suddenly magic happens.
3- I don't quite get the 15 reps for everything. I'm not saying fall into the "low reps for siZe" over simplification, but definitely look into muscle fiber types and what groups are typically better responders to different ranges.
4- Full body sessions can work, BUT ask yourself if you've been making the lbm gains you're after following your current program. I always say that the training program is the least important factor in any successful prep so long as you're not doing anything insanely stupid. It is however a great topic for selling articles and trying to get new clients.
5- I want you to look at successful competitors who have similar heights and approximate structures to yourself, find their stage weight, and then realize that they were about 20-25 lbs heavier than that weight and relatively lean that. Look in the mirror and ask yourself if you look like they do.
A couple of examples of competitors (Natual pros actually) from this site:
Rob Stein - about 5'4, competes about 145 lbs
Brad Grunner - about 5'10, competes about 170
Now that's in absolutely diced and shredded contest shape, WITH muscles. Too many people rush to get onstage and in dieting themselves into a lighter body weight overlook the premise of actually bringing an impressively muscles physique with them.
Imo, and this is based solely on your posted pics, is work more on a recomp / lean gain approach for a while before thinking about staying onstage. Sure you could force yourself lighter and do a small show hoping for a little trophy validating your knowledge about training and nutrition, but I guarantee that you'd feel better walking out onstage knowing that you look better than you ever thought you would, and that means cuts and muscles:)