HELP: Due date during school

I need advice or encouragement from mom's that have given birth during the semester they were in school. I just found out I am pregnant and we also have a 7 month old daughter. Due to depression and anxiety my husband hasnt been able to work for 4 years so I am the only income for my family. We are living with his parents to save money and so they can help with my husband and the baby. I do the majority of the housework for us and some housework for the rest of the family. I am due around late September and will be starting my core classes for my medical coding degree. I have gone to school so many times but changed majors or had to quit due to our situation. I'd probably only take 4-5 weeks off work like I did last time so between full time work and full time credits in school am I absolutely crazy to think I can do this with a new baby and a 16month old? Has anyone else been in a similar situation? I feel like I'm handling it great with taking care of my daughter and working full time, I am just so scared of failing and being disappointed.