Never install an update while working on a deadline.
Never install an update without a backup.
Always make sure your system updates are known to be compatible with all your mission critical applications before updating your system.
Your best choice now, is to backup your mission critical documents first, if you don't already have a backup, erase and install your system, install your mission critical applications, and bring over the mission critical documents.
In the future always follow these steps when upgrading*:
Might also want to have a look at my post here.