There is no nothing wrong with getting pregnant whilst breastfeeding

 

I have a son who is 19 months old, and I would like to know: is it permissible for me to get pregnant whilst I am breastfeeding my son? What is the ruling if I get pregnant and cannot continue breastfeeding him? Do I have to wait until I complete two years of breastfeeding, and then try to get pregnant?.

Praise be to Allaah.

It is permissible for a man to have intercourse with his
wife who is breastfeeding, and there is nothing wrong with it. And there
is nothing wrong with a woman breastfeeding when pregnant, because of the
report narrated by Muslim (1442) from Judaamah bint Wahb al-Asadiyyah (may
Allah be pleased with her), that she heard the Messenger of Allah
(blessings and peace of Allah be upon him) say: “I was thinking of
forbidding intercourse with a breastfeeding woman, until it occurred to me
that the Romans and Persians do that and it does not harm their
children.” 

But the woman should examine her own case and her ability to
put up with that, and she has to weigh up her duty towards her nursing
infant and what she herself will need during the period of pregnancy. If she
thinks that she may not be able to balance matters, or she thinks that it
will harm her, then there is no reason why she should not put off getting
pregnant for a while, so that she can finish breastfeeding, then start a new
pregnancy. 

Ibn Jibreen (may Allah have mercy on him) was asked: 

I am a woman with six children, and in most cases I got
pregnant before completing the breastfeeding of the previous child -- before
the end of the two years -- and I want to use the so-called “coil”
[intra-uterine device, a form of contraception that is inserted in the
uterus] to prevent pregnancy for two years only. What is the Islamic ruling
on that? 

Answer: 

There is no reason why you should not do that, if both
spouses agree to it, and they are certain that it will not cause any harm to
the uterus or prevent having any children in the future and so on. End
quote. 

Fataawa al-Shaykh Ibn Jibreen,
96/2 

See also the answer to question no.
21203. 

And Allah knows best.