Mom of two and scared.

I recently had my daughter on August of 2015 and she'll be a year next month and I just found out I'm pregnant again and it wasn't planned And me and her father do use protection and now this one time thing is stressing me to know to have another baby. Like am I bad mom to get pregnant so soon when it's my daughters time. Is it gonna be hard? Like I have a lot of worries and don't know how to play off to the grandparents! Like were pregnant. Second grandchild.