Yes I too struggle with this all the time. I went through a deep depression last year over this (and some health problems). The what ifs are very hard for me.
My husband and I decided to try for another and we're in the process.
Our daughter is now 2.5. I basically decided a while ago that I don't want to have any children past 30-unless they come out with major treatments for us. I'm 27 now so the clock is ticking.
I doubt I'll ever have more than 2. But I know my personality. After 2 I'd wish for more. I'm just a baby/child person, a born mother. But we just can't always have what we wish for. There's people without Cf that wish for more kids but just cant have them for one reason or another.
I'm very happy with 1 daughter, but if I couldn't have another it would be really hard for me to find a way to live with that.
There's so many other variables besides just Cf. Support-I live next door to family that is extremely supportive. I have a supportive husband financially and otherwise.
And my daughter too-she's got a rambunctious personality. She's a handful. So waiting a few years to have another was easy for me. If I had another one as challenging as she's been, stopping at 2 will be easy! <img src="i/expressions/face-icon-small-smile.gif" border="0">
BUt yes, you are not alone. For me the decision to have the 2nd was harder than the first.
If your kids are pretty good and motherhood has been easy on you physically and emotionally then I'd talk with your doc about going for another one.
For me though, I'd have a hard time leaving 3 or more kids with my husband, mother or mother in law while I am in the hospital. My family is amazing, loving and cares for her exactly the way I would. But I'd feel bad b/c thats alot to deal with. Plus just physically caring for that many would be too much for me at this point.
I ALWAYS keep an open mind to the future though-when it comes to new treatments, even adoption. And I try so hard to look everyday at what I do have.