L.H.
First reaction? - Yes.
A 2nd pregnancy is so much different than the first. Trying to take care of a baby while being pregnant is really, really hard. At 6 months old they don't do much at all - they're really easy. If you were to get pregnant right now, at 8-9 months of pregnancy you'd be chasing around a 14 month old toddler...
I am 8 months pregnant and my youngest son is 17 months old.... and let me tell you, I feel like I am about to drop. I wake up exhausted. I am running out of patience. I'm stressed, uncomfortable, and feel like a bad mom sometimes because I can't do anything with my little guy anymore.
At least wait until he's more independent. I promise. Trust me - wait until you see how much work he is going to be. You will realize what I'm talking about and be thankful you're not expecting again just yet. You'll need all the energy and stamina you can get trying to get him safely into toddlerhood.
Just my two cents!