Unable to decide

I have a 4 year old and 9 weeks pregnant. I'm having only my husband to support here. I'm not sure if I can manage after pregnancy. I am a working mother and I really want to take care of my new born and my 4 year old.. N not sure if I can handle this. Most of my friends are asking me to call my parents in law for help. My mom is not well and she cannot come.. Any advice ?