How old are you? Being pregnant takes a toll on your body. Nursing also takes a toll on your body. The Leleche League will tell you that it's OK to nurse while you're pregnant. Infact, they'll tell you it's OK to nurse a toddler and a baby at the same time!
As good as breast milk is....lots of kids stop nursing very early on do just fine on formula. Many more stop nursing after 9 months. You've already done great by your child.
What you do now depends on your body and how you feel. Esp as you get closer to your 30's, your body doesn't bounce back as quickly between pregnancies.
J and P are 18 months apart, and it was hard on my body. P and the twins were also 18 months apart, and that was also hard on my body.
Esp if you choose to keep nursing, be vigilant about taking your prenatals, track your food intake, eat the best foods, drink too much water.
If you decide to cut back on nursing....stop slowly - 1 feed at a time....replace it with other things like reading a book together or singing songs together. If your baby's old enough to go looking for your breasts under your shirt, it helps to wear a one-piece swimsuit under your shirt. Hug and hold him more.
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kids 18 months apart are wonderful. It's adorable to watch them play together, grow up together. It's almost like having twins. There's a few tough parts, but for the most part it's just adorable. Congrats :)
feel free to msg me if you have any specific questions