Breaking the news

Hello ... So I have a little problem that is weighing heavily on my mind... My sister in law was pregnant and lost her baby at 19 weeks... I cried for her I couldn't believe it... But now that I am pregnant how do I go about being around her... I know she is hurting but I'm happy and feeling blessed I preyed to God for this baby.. I know nothing is for sure because I am only 6weeks rt now... But we haven't told anyone about our bundle of joy because I do not know what to do?!!!..