I have

DCB - 3 yrs
DCB - 22 months
DCG - 22 months
DCB - 17 months

I started both of the 22 months at 11.5 months. I thought when I booked them in I'd have a 3 weeks gap, well, turned out that I didn't. It was a rough month or so. I swore I would never do it again! Then both of their mom's got preg at the same time. HA! Now I'm doing it again this fall. But, there really is a bit of a gap this time.

i find it hard with 2 under 18 months. Once they hit 18 months it's no problem, but under they're too high maintenance for me to take 2. The sleeping isn't always there, they have teeth coming in that compromise their moods, sometimes they need high chairs right up until 18 months plus depending on the child.

But, go with your instinct. It's better to bow out now then to have to term later and admit defeat.