My site automatically updated during the small hours, however, I received a notification with some errors:

The following errors appeared during modules upgrade:

Accounts Manager module:
Ads module: Array
Antispam module:
Events module:
Nexus module:

When I logged onto my site, which is due to go live, Monday after next, I found that some of my Ads had been totally deleted.

I also received 4 database error emails yesterday.

After logging into my studio, the modules which failed to load were ready for updating, so I clicked them and they disappeared, after they said that they were queuing. 

How do I find out if they installed correctly and how do I prevent loss of content on future automatic updates?!