Am I ready?!

Cami • I`m 25, married to the greatest man. Beautiful 2-year-old daughter, Christmas baby on the way!
I'm so back and forth as to whether or not I'm ready to get pregnant.
​Baby #1 is almost 2. She was SOOOO HARD as a baby, she didn't sleep more than 2 hours in a row until she was 9 months old. Now she is really fun and a HANDFUL like any toddler. I suffered post partum depression too, which made my life miserable since I'm usually a very upbeat and cheerful person! I'm scared!
​How do people do it with 2 kids? How did you know you were ready? A big part of me wants the kids close in age but mom also needs her sanity! Help please!!