Congratulations!
I'm due to have my third very soon and I'm predicting (perhaps hoping) that I will lose all of those feelings of wanting more children. I have been clucky for a very long time and thought that three would be our limit, but now I've read your post I'm wondering if I'll also want more!
You are full of feel-good hormones right now enjoying baby cuddles and soaking them up, so it's no wonder you're dreaming of more kids, but I would also advice to wait until they are at least a year old before making a decision.