Most of iphone cydia and apple apps crash on launch after cydia app update.

Hi All, I am on iphone, 16gb, 5.1.1 factory unlock. My iphone was doing like a charm. I tried to update my all cydia apps alltogetter. AND then my iphone booted. now the problem is Most of cydia and apple apps crash on launch after I updated cydia apps altogether. Where I stand now? If I have lost my jailbreak. I also have an apple app TEXTWRITER with very important data in it. Is there any way to extract data from it? Please help