Panicing, My sites shut down!!!
PermalinkUnable to connect to database.
A database error occurred while processing this request.
I also installed wordpress for each domain and that was working great too. Now that does not work either and will not connect to the database.
The only thing I can think of is that I installed wordpress on a separate database for another domain (acachurch.com/blog) on the same server last night. Would this have anything to do with it?? Any help is GREATLY apreciated!!! Thank you!!

Otherwise, check /var/log/ for your apache or system logs.
Make sure the databases are there, user/password are correct .. etc.
All these should give you a better view on what's going on.