I did that too. I wonder if it's a common time after having a baby to want another one. I would suggest waiting a little longer, though. You want time to be able to focus 100% on that baby (at least I do!). Here's the spacing with my kids:
- Baby #1 to #2 is 4 years (way further apart than I ever wanted!)
- Baby #2 to #3 is 19 months (got prego when #2 was around 10 months)
- Baby #3 to #4 is 22 months - this was a good spacing.
- Baby #4 to #5 is 15 months - this has been too close for me
I got prego with #5 (surprise!) when baby #4 was only six months old. I get really bad morning sickness, so I had about 10 weeks of that while trying to take care of a baby and three other little ones. The baby was the especially difficult one because she was at a very demanding age, and I was barely functioning with the morning sickness. It was nightmarish to be honest.
I was nursing her and my milk dried up due to the pregnancy. Something I wasn't happy about. When babies reach around 7 month (can vary per child) they start sleeping much differently - more difficult. I find babies from birth to 7 months to be quite easy compared to how challenging they get later on...so keep that in mind. Your baby will likely get a lot more challenging and time consuming. If you get morning sickness, it is a challenge to deal with both things at once.
I *am* excited for baby #5, who is due in about 8 weeks, but I stress over how my current baby will do. A good spacing for me is 18-22 months spacing. That gives me enough time to give the baby lots of snuggle, nursing, and carrying time. Once I get very far along in pregnancy, it's very difficult to carry my kids. Right now it's very difficult for me to carry my 13 month old. Makes me sad.
Anyway, so those are my thoughts! From my experience, getting pregnant at 5-6 months post baby is more difficult than it needs to be...hehe. And, while current baby will survive, for me, it feels too soon. Waiting a little longer to be able to give baby full focus is ideal to me.
Then again, if you don't get very bad morning sickness that would make a HUGE difference. It would be much easier. The morning sickness almost did me in...hehe. But if you don't get that very bad, then you'd be able to keep your focus like you want.
Hope that helps!
ADDED: I feel like I am coming across too negatively (hubby was talking to me almost the whole time I was trying to type this...hehe). While I don't think it's ideal to have them super close, I do love it. They keep you on your toes. And, I know it'll be a lot easier to chase after the kids once I'm not waddling like a duck and can have my body back;-) But I totally agree with the poster above that little ones are awesome and I absolutely love it. Regardless of the spacing of my kids, they are all very close and love each other a ton. You should do what both you and your hubby want:-)