Maybe you should do check again and discuss with your spouse pertaining this issue if you are pregnant. Having said that to take precautionary steps like contraceptive method like pills, or if do not wish to take it then you may use condom eventhough it is not 100% safe or chances of pregnant is likely to not happened.
However, if it is already rezeki, embraced it and take it positively. You need the support from your spouse esp.
And most mummies, will have healthy egg follices once they give birth. So, that is why it is highly advice for contraceptive method once we give birth.
Shaffy Shahril