Samsung Galaxy S4 — samsung 4.2 update last night

I upgrade my phone last night and now the data notification toggle is gone and the outside of my screen flashes red every time i touch the screen. Plus i had trouble texting on facebook, it would not let me edit a post, the screen kept jumping. Plus my battery is running out much too soon.

Any suggestions on how to get the data notification back? I used to shut if off to ensure I didn't go over my limit. Sometimes I don't know when programs are running and wasting my data allowance.

thanks.

I thought that if I did that I would lose all my current contacts, apps, widgets, etc?

I thought that if I did that I would lose phone info