Please help - lost all of my contacts...

[Bengaboy]

I do not have a clue why, but my iphone has decided to delete all of its contacts....

4 years of numbers lost, I have just plugged in my iphone into itunes and the last backup other than the one that it just created was April 2012 :/

Any help would be appreciated, what about if I restore my Macbook to 2 days ago to get an old itunes backup of my iphone - would this work?

 

[Bengaboy]

This sucks - I am having to go through my texts and add contacts that way. Annoying...