Ready for baby #2??

My son is current 19 months and I keep getting baby fever. My husband is all for it. Of course, we're a bit nervous... But, we saved all of our son's things that were previous used. Clothes, bottles, baby toys... I was able to breastfeed quite easily. I just can't help be more afraid of the unknown of how it will all go and how our son will react. And of course, I wonder if it make me sad to be done with the baby phases. I'm turning 25 and my husband is turning 29 and we want only 2 babies and somewhat close in age, so I can go back to work in a few years when they are of school age.

I want to hear all of the advice and stories! Please and thank you!