When I login to my account the system ask me for my wifi password in a prompt that looks like the main ubuntu screen and later again with the gnome 3 look and maybe 2 or 3 more times, sometimes the third time it connects and some it dont. I'm lost.
I will assume you're running Network Manager. Right Click on the Network Manager symbol (in the top row on your screen. On my system, it is just Left of my speaker symbol), scroll down to "Edit Connections". A popup will open. Click on the "Wireless tab". "Add" or "Edit" a connection, and fill in your information in all of the tabs.
To find out what's happening, here's what I would do:
Possibly the wireless AP you're connecting to is getting reset somehow.
Setting the password from the applet menu will not work. Even I faced the same problem (while using Ubuntu 12.04 with Gnome3) until I set it by accessing the Network Manager directly and entering the password.
Follow these steps:
It should remember your password from now on. I think this must be a problem with Gnome3 not integrating well with Ubuntu.