I was posting before under juvenilesuccess. Just thought I'd give you all an update.
We co-sleep, feed to sleep etc and the regression hit when she was about 4.5 months old, it lasted about 3 weeks and she was waking up hourly.
We're now back to previous pattern which is about every two hours and feels much more manageable.
At the time I was convinced it was just bad habits and I had myself to blame but having come out the other side I really don't think that's the case. There was a general correlation between the end of the regression and weaning BUT I honestly think it was a coincidence.
Next step is the allusive 'sleeping through' and getting her in cot! Must admit I still go to sleep every night thinking what if this is the night (in the same way you imagine yourself winning the lottery etc - very unlikely but somehow you convince yourself it might happen)!
My best advice is to just do what you need to do to get through - forget the rods. Like Tiredemma suggested baths are good for that 'me' time if you're not getting a chance to catch up on sleep during the day.
Also, I think for me the anxiety these things cause is almost as bad as the lack of sleep. I have a baby who wakes up every two hours, hates the car seat, is very hit and miss with her pram, is always the noisiest baby at groups etc. For the most part I deal with those things but really find it hard when I start the 'why' thought process and compare us to other mums/babies that can do all those things. That's because the inevitable answer is either I'm a bad mother of I have a "bad" baby - both of which are bollocks! ... A bit heavy, but I think I'm just trying to say I find things easier when I just accept it. We're all doing brilliant jobs and the sleep regression is NOT our fault and doesn't mean we have bad babies!