Are these new wheels? Seems odd that you would have several spokes loosen in just a week.

Start with the loosest spokes and work from there. Take it nice and slow. Once you get the spokes fairly close to tension, turn the spoke wrench just a quarter turn or less each time.

It's pretty easy once you get the hang of it and if you mess it up, just drop it by the LBS.

Glad to help.