If you go by BMI then, you're smack bang in the middle. And your calories seem to be on track if not a bit low, and you're breastfeeding so I personally wouldn't drop anymore.
The toned look takes time, jeez, I've been at this 5 times a week for 9 months only taking one week off and I still have pockets of fat which are a sod to get off. Focus on body areas, if it's the tum you want to lose, do more core work or yoga. Saddlebags, bar work (as in ballet dancing bar work not 10 pints of Guinness 😂) arms, try flyweights with dumbbells. As someone mentioned, mix up the workouts you do, your body gets used to repeat exercises and is less efficient. Try resistance bands, kettle bells, yoga, Pilates, HIIT, CrossFit, sprints rather than 5k.
Having a blow out on food from time to time is ok, again, it's that mindset of "oh, I've been bad" really focus of fuelling your body with the best types of food you can and over time you'll crave the not so healthy stuff less.
Most of all, be kind to yourself!