I feel for you Dragonbutter, Im sure it will all improve with time just through things moving on, random changes and your DDs getting bigger. Cant totally relate because have only one DD and thats much easier.
Heres where I stand on it all! My DD is 8 months old. DH and I would like more soon. I am currently a SAHM. We are totally broke because of that, but both me and DH are happy with that, including being tenants in the Land of the Homeowner. I have days, mostly when Im tired, pre-menstrual, and the weather is grey, when my head spins full backwards and forwards with who am I, what am I doing with myself type questions, and images of pre-baby me. ( good job, obsession with jigsaw clothes, sporty, busy, travel mad, bantering with colleagues). Although by the time I have had my baby I have boxed myself into a corner at work and was self employed in stressful unpleasant branch of work offering no social stuff- cant get back to work I did when younger without doing the hours I did when young. Anyway- bad horrible thoughts type days happen, but not that often. More often I just feel bloody lucky to be taking life slowly. I am sure life would be much much harder with more than one DD. But I guess what I am trying to say I wonder if there is something lazy bones no ambition whatsoever wrong with me!! I am perfectly happy most days pottering around with the radio on, cuddling my DD, taking us for a good walk, doing everying v slowly baby pace, chatting to the local fishmongers, going to the odd baby group. (some of them are quite odd too). Actually I have had guilty thoughts lately that I may be slowing my babies development down by loving lounging around so much!! Am I 32 going on 62? Do I need a rocket up my arse to get me moving? I look at youtube vids sometimes over brekkie and my husband was shocked when I tried to make him watch a LOST take the piss. 'Is that what you do all day?" Ahem. Not ALL day.
Anyway, I guess I feel like a throwback, born in the wrong era or something. I am happier these days hanging out with 'the boys', childless bloke friends of DH's- it seems like they are the only people who think its normal to be just being a mum for now. Women friends, men with kids whose wives inevitably work and are all up at 5 for the drive to the creche pre work etc, I do feel sensitive to what I percieve as their disapproval.
I wonder how much of your feelings about having a lack of identity are to do with the current freakish outsider status society seems to have given SAHM's. Because you do inevitably have an evolving identiy, you are still partly the old you but you have moved forward to new territories from your former self, and is there some way of seeing all the positives to your new identity, not just the lack of former stuff. Sorry. Dont really know what Im trying to say. But when you have days when your thoughts spin out of control - well I try not to make any big decisions on those days and let it pass!!