Losing important data is a physically painful experience.  I have been there.

My advice. Take a break, get a snack and soda.  
Less is more.
The less that is done, the higher the probability that your data can be recovered.  
Get a pad of paper and start keeping notes.   
Write down what has happened so far, especially any error messages. 
Avoid the temptation to try a repair, safe mode,  or a rebuild. 
Search Google on “Server Data recovery” and call 2 or 3 places on the first page.   
Take notes while on the phone. 
Did I mention, less is more. 
Find a non technical person to help you create a plan.