I’m not a fan of calorie counting. It’s tedious, and unless you are weighing your portions, and know exactly how your meal was prepared, really inaccurate. I did it years ago when I was predominately a weightlifter and it works, but…
If you are restricting your calories too much it will be reflected in you workout performance, so you might want to look over your training logs.
When I switched to running six years ago and needed to get my weight and body composition commensurate with running I chose the outline in Matt’s “Racing Weight” book. I drifted to the “My Plate” planning which is similar to the Racing Weight diet quality philosophy, but a bit looser and more practical for me. I would also weight my self every day. That, with all of the 80/20 Endurance running helped to safely drop 40+ pounds.
I’ve stopped weighing myself daily and only check weekly. I found that knowing my weight each day could cause me to restrict calories too much, drifting to what I consider an unhealthy body fat level (below 10%). I can now understand just how easy it is to slip into an eating disorder. Be careful.