NURSING AND COUNTING CALORIES?

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so I had a baby four months ago and I'm breast feeding her. so I am most confused about the calories. I'm planning on just working out and eating healthy with plenty of water and not worry so much about calories? I don't know. but I would still really like to lose more weight. I lost all baby weight with nursing, but still def on the heavy side! need advice on moms who counted calories while nursing. Thank you!