Feeling like having the flu is kind of good, it means you really needed the flush.
Most people who are feeling like you do the flush right away again. My symptoms were killing sinus pain for a long time. The 2 weeks is so the stones in the back can come forward, but in your case they are still blocking the ducts.
So go ahead and do it again.
Try to find Fsboeira (Fernando) messages, he has done that before. Go to bottom of page and click on username - all messages and then names are in alphebetical order.
Julia Chang also writes about redoing the flush http://www.sensiblehealth.com