Well I know exactly how you feel!! I'm pregnant with frat twins (boy and girl...lucky us!) and have a 14 month old at the mo. Nina will be just 17 months when they are born!

I was freaking out at first, especially because I have no family here, and my DH is in the army (hooyah), and away a lot. I have started putting Nina into one day a week long day care so that she gets some socialisation and is well used to it when the twins arrive. It also gives me a break and a day to either rest or get chores/erands done.

I wouldn't listen to any negativity surrounding your abiltiy to cope. As many have said before me, we are only ever given what we can handle, and have been 'chosen' to have two babies at once (gee, someone certainly thinks I'm capable!!!). If you get any flack, smile serenely back and say "we'll be fine, I can't wait", even if on the inside you are packing it!! A positive mantra every day can make a world of difference!!

Hope this helps, stay positive!

Julesy