Help!! bleached my dark brown hair and its destroyed!!!

Hi all.. So I recently lost my mind and bleached the you know what out of my already damaged hair. It is extremely fragile and the color is horrible! I tried to tone it to get the yellow out (the rest is platinum) but it didn't lighten enough and my hair looks bluish. I've been deep conditioning, not shampooing, soaking in olive oil, adding all kinds of restructuring products, etc. Ultimately I want to go back dark because I look ridiculous, but I don't know if my hair can take it. It needs to be lightened or darkened it looks horrible. Please help!!