I turned on bitlockeron my drive E: when incrypting was 15% my laptop shot down and now I can't unlock my drive.when I want to unlock, blue crean apear and system restart....
That sucks. Everything isn't lost beyond hope.
Have you tried Microsoft's BitLocker Repair yet ?
Do you also have a method and comfort level for imaging the thumbdrive raw in case your repair efforts damage the volume and you'll have a reliable backup to revert to ?