I have deQuervain's in BOTH wrists-- it was worse in the left-- started with hormonal changes when I was 5-6 weeks pregnant with my first child-- seven years ago!!! This was not carpal tunnel, not an "injury." Doctor said in most cases, it goes away after you have the baby, but mine didn't. I limped along for YEARS on ice packs, ibuprofin (both do help a little) and periodic cortisone injections. I learned how to pick my children up without aggravating it too much, but it was a consistent and significant problem for me. I had even scheduled the surgery once a couple of years ago, but got freaked out about the cost of it and put it off. Well, eventually I decided I deserved not to be in pain anymore and did the release surgery on my left hand (the worst one) for my 35th birthday. (Baby #2 was about 10 months old at the time.)
I did have some pretty significant pain after surgery for a few days-- I remember wondering if I'd done the right thing. And one side of my left thumb was numb for several weeks. I don't think I was very limited as to what I could do (baby-care-wise, I mean) after the first few days. My husband had to take over doing the dishes, though. (Wish that had lasted!) Anyway, after healing from surgery (which wasn't that bad) I have had NO pain in that hand related to the DeQuervain's. (Apparently I may be pre-arthritic in that hand as well, but it's a totally separate issue. Figures, doesn't it?) I'm lovin' the results so much, I'll probably do the right one as well if it starts flaring up on me again. (Although I'm VERY happy that it hasn't been bothering me.)
In short, I'd say don't jump right in to surgery if a cortisone injection takes care of it for a long period of time. Also, my doctor had a handout outlining how NOT to aggravate the condition. (You've probably figured a lot of them out on your own-- picking up baby under his armpits between your thumbs and index fingers is a big one!) I'm guessing if your son is 14 months old and you're asking about this, it's been a pretty significant issue for you. Having been through it, I'd say the worst part was financial. So get the facts from your doc and your insurance company, know what you're getting into so you can plan for it, and don't be afraid to do the surgery if that's what you need. Recovery was definitely a bigger deal than my doc made it sound like, but was bearable and manageable, even with a 10-month old and a 6-year-old. If you've been living with deQuervain's, you're pretty tough! It gets better quickly after surgery, then no more pain! I had stitches and was wrapped-- no cast, no sling. Check with your doc, and good luck!