Newmum- you sound just like me!
I don't know the answer for you, but I have decided that, for the moment anyway, I want to keep fee earning. I'm in pensions at a corporate firm and at least 70% of my workload is normally transaction related. I realised before I went on leave that I needed to get some certainty about hours, even though I still wanted to work full time. My DH would pick up Mini-plibble, but he works overseas pretty much every week and swoops home on Thursday night so it is all down to me. In practical terms (although not emotionally) it is like being a single parent.
I ended up agreeing with work that I would be in the office from 9-5 and otherwise would work from home. While my bosses seem dubious about whether this could work, I can think of no reason why I can't do the same job from home. After all, an awful lot of time on all-nighters is spent sitting about waiting for the other side to come up with their wording/take instructions etc and I can just as easily do that from my sofa. I have been frantically training Mini-Plibble to go to bed at 7, so I can then get on with work. Obviously, since we operate a 24/7 office, my bosses weren't keen, but I arranged this on a trial basis which at least gives me time to get back into work. Personally I would rather go back to a job and a department I know so that I can get used to being in the office again than go straight into a new job from leave. Better the devil you know and all that...
For what it's worth, I have found that firms find it hard (as it would be pretty unreasonable) to say no to a different working arrangement if you propose a trial period of, say, 3 or 6 months. At least that can buy you some time to decide what you really want to do or just to get pregnant again!
On a different note, if you are not wedded to fee earning, have you thought about going in-house? I could imagine lots of companies must need in-house property specialists.