Hi Claire!
Did you see my thread?
www.moomie.co.za/index.php?option=com_ku...587&Itemid=82#227615
I experienced or are experiencing all of your issues as well.
The thing that freaked me out the most that she only started saying now (3 years, 3 months) when she wants to go to the toilet. Before that, I never got the idea that she gets the "Sensation" of needing to go to the toilet.
All 3 doctors I spoke to said that I must chill out. Some children are really only ready to pottytrain emotionally closer to 4 years of age!!

We are making slow progress, though we are moving forward.
I don't really have any advice for you! Just try to keep calm when accidents to happen and clean up with minimal fuss. But I am sure you know this already.
I have heard other moms say before, don't think you will pottytrain a child when YOU feel ready, a child will be ready when he is ready!
It is frustrating to hear that other moms trained their 22 month old in one week and you are struggling for a year and a half...I think I have realised that one shouldn't compare and accept that children are really ready at different ages, even if we think it should have been sooner.
Good luck, I KNOW this is really, really, frustrating!!