Not to assume you are "stupid", but have you hidden it on accident?
Go to your BB full menu, hit the BB button, hit show all, and if it's hidden, it will show up, but appear shadowed. Highlight it, and select unhide.
i have sprint and when I do an upgrade my phone always looses the browser icon. What I do is go to options, mobile network then hit the blackberry menu key and start provisioning. That does it for me!