I'm on day five of my first tray. I filed down the edges so the trays aren't as irritating, but it's actually the attachments on my teeth that have caused the most problems.I have sores on the inside of my mouth and under my tongue. Chewing is very tricky, so I'm tending to eat more soft food. The worst part is I just feel yucky, slight headache almost like I'm coming down with the flu. Chloraseptic spray and Cepacol lozenges which contain benzocaine help a lot with the pain from the sores, Advil/Tylenol helps with the headache/mouthpain, but man I still just feel yucky. Does this go away?