You asked

Breastfeeding and losing weight: how can I do it safely?

The good news is that breastfeeding can naturally help new mums to lose weight! The process of breastfeeding helps to burn off stored fat and makes losing post baby weight easier, when combined with a healthy eating plan and moderate exercise.  
However, while breastfeeding gives new mums a weight loss edge, it’s also wise not to try and rush it. Excessive dieting and losing too much fat too fast can cause your body to release excess toxins and PCB’s that are stored in the fat cells in the body. This, in turn, can be passed on to your baby and can be harmful to his or her health.
Experts advise that new mums anticipate a ten month to one year weight loss period after a baby, and that weight loss should be gradual. It’s important to make sure that you eat enough to provide extra energy for breastfeeding, and that you stay hydrated too.
So, while you’re recovering from pregnancy, try not to rush things. Take it slow, enjoy your baby, eat healthily and do some moderate exercise. The weight will come off eventually, and no one expects you to be back in your pre-pregnancy jeans overnight.

More questions

Mums understand the benefits of breastfeeding and some may be tempted by online sources if they're reluctant to breastfeed themselves or are having problems.
Babies can often be fussy in the evenings and you may find it difficult to nurse or settle them. 
Here are ways to know if your baby is getting enough milk
Breastfeeding and medication: what you need to know
What's the difference between breastmilk and formula?
Breastmilk has plenty of iron to last your baby at least the first six months of his life. 
Nipple shields are used if baby wont take the breast or for sore nipples
As of February 21st 2011 the HSE is recommending that all babies, including babies that are breastfed be given 5 micrograms of vitamin D3 a day. This is because recent studies have shown that mothers and...
Spitting up is very common and most young babies spit up at least once a day. This is because their digestive systems are immature which makes it very easy for their stomach contents to come back up their...