For anyone who runs into the same problem, I tried this which works (probably not the best way)
SELECT [2GFullWk_Tab].Week
FROM 2GFullWk_Tab
GROUP BY [2GFullWk_Tab].Week
HAVING ((([2GFullWk_Tab].Week)>Format(Date(),"ww")-"5" And ([2GFullWk_Tab].Week)<Format(Date(),"ww")));
I also found this...