Sore Throat - Painfull To Swallow Food Or Even Drink?

After the flu you should always watch for a secondary infection. I would recommend you see your physician as soon as possible. You could have a viral infection known as pharyngitis (which can be more painful than strep throat)...the remedy for this is lots of rest, fluids and Motrin (if you're able to tolerate this type of medication) for the pain. You could also have a bacterial infection - strep throat, which must be treated for 7-10 days with an antibiotic. If you're fatigued more than usual, I'd also ask for a blood test to check for Mono. Good luck and with any illness that lasts more than 3-4 days without improvement, you should always seek medical treatment.