Did anyone start trying for a baby before a year pp?

My baby is 9 months and we were going to start trying once she turned 2. Now we are in the middle of a pregnancy scare and my husband was like well if your not we should start trying , and i was completely shocked, I want to but I’m nervous and scared since she’s still so young idk how to feel. I don’t want to take any attention from her and idk how hard it will be being pregnant and have a baby this small or if I were to get pregnant now they would be around 18-19 months apart and I’m wondering how hard that will be with a 1 and a half year old and a new born