Talk to me about having three kids... is it as crazy as it seems?

DH and I have been set on having two kids forever but now that I'm in the third trimester of this pregnancy I'm starting to doubt whether or not I'm done. Maybe I'm just being sentimental because these could be my last few weeks being pregnant.

I'm not really concerned about the money factor. Our daughter is three and we would wait until she's in Kindergarten to avoid triple daycare payments. I know we would need bigger cars but that's not a big deal either. We have an extra bedroom in our house so we have space for another.

I'm mostly worried about splitting my time - will life be totally crazy with two full-time WOH parents? How do you balance doctor appointments/activities with three kids? I know I'm totally getting ahead of myself because I don't even have #2 yet but I can't get this out of my head!