How can I restore my dry, damaged hair?!?

Ok, so this time last year I had long, lovely, brown highlighted hair. I would say it was almost blonde but all due to highlights so my hair was in a very good condition. It was probably down to my breasts. I was getting it coloured and cut at the hairdressers every 8 weeks. I developed a fascination with having white hair but I knew my stylist wouldn't make my hair this light as it would ruin it. So..big mistake.. I decided to home colour it. I bleached my hair several times over the period of about 3 months. I would say about 10 times!!! I did get my hair to the desired colour (white!) but eventually my hair just started to snap off. When I used straighteners on my hair it just broke off completeley. It became so bad that all my hair was different lengths! I was too embarassed to go back to my salon so I got one of my friends to cut my hair all to the same length. I would say it is shoulder length, maybe shorter. I also dyed it back to my natural dark brown colour to avoid any more bleaching. This was 6 months ago.. I thought that my hair would eventually get more healthy and start to grow again if i stopped messing with it. But I am 5 months pregnant and this seems to have prevented my hair from changing at all. It is still shoulder length, although the bottom layer is much shorter, probably only 2 inches long, and more hair snaps off all the time. And the condition is still awful!! It is so dull and dry, its just embarassing!! I really do not know what to do to get my hair to be healthy again?!?! I havent coloured it for the last 6 months. Are there any products I can use to revive it? I don't mind the expense, i just want healthy, shiny hair again =( Please help..