I quit outlook and now the icon has disappeared altogether alone with all my customisation of outlook

I am running Microsoft Office for Mac Home and business 2011. This morning I noticed that my tasks folder was empty. I decided to quit outlook and restart it in the hope that my tasks would reappear. Instead when I right clicked on the outlook icon on my desktop and hit quit, the icon disappeared all together. I then went to finder and searched for outlook. When it came up, I clicked on it and it brought up outlook, but it is a brand spanking new outlook without any of my sent items, inbox items, my contacts, my tasks, my sub-folders or my deleted items. Help!!! I am devastated, particularly by the loss of all my contacts.