It's highly unlikely that a dry socket will form one week after the extraction. Do you or did you smoke?? That's the biggest contributor. Rinsing too soon is also a major factor in dry socket. I really don't think the dentist would have told you everything was healing nicely if it wasn't.
If you have a foul odor, try flossing and see if you can ocate a specific area that that smell comes from, it could be you need to floss there more often!