Hi Khatija do read these articles, it will help you.

<span style="color:#3B5998;"><b><a href="http://app.babychakra.com/article/3502">Have You Prepared Your First Child For A New Sibling?</a></b></span>

<span style="color:#3B5998;"><b><a href="http://app.babychakra.com/article/3473">Are You Planning For A Second Child?</a></b></span>

yes ok

You can go for a preliminary check up and then start planning...take good food and folic acid