Have you associated your Candy Crush with Facebook account. If not, take link it first before upgrading to Android 5 Lollipop. Many peoples have reported to lost all their progress after up-gradation to Android 5.
I have seen peoples having reached 350 levels are now from zero level again. If you cant afford to take such risk, make sure to have a back up and linked it to Facebook so that all these progress you have made playing day and night.
Hope it helps you guys.