Installed OS 5.0 but....

My facebook icon was still on homescreen but in the middle of "resetting" there was an "error" and now it has disappeared. It shows that I still have in my apps but no icon. How do I get the icon back on my homescreen. I hit the menu button thinking it would show an option of move for me to move to home screen but not the case.

Also, I have 2 icons for the same email account (gmail) and can't see how to delete one of them.

I am posting this here since the above happened as a result of the OS 5.0 installation.

Thanks for any help.

I would wipe and reload everything. better safe than sorry.