Hi,
You could be having sinusitis or rhinitis. Do you have associated symptoms of cough, wheeze, breathlessness, post nasal drip etc?
You should try steam inhalation, saline nasal drops and oral antihistamine medications for your complaints and see if it helps with the symptoms.
You should see your doctor and get a clinical examination for a diagnosis and to evaluate if any investigations are required including blood tests, chest xray and CT scan of the sinuses.
Are you allergic to any specific substances or have had allergic reactions in the past?
You could read the following link -
http://en.wikipedia.org/wiki/Sinusitis
Let us now about how you are doing and if you have any other doubts.
Regards.
Sounds like all the congested mucus from your sinus infection is shifting as you recover, and this can feel sticky and stuck in the throat. Hopefully should clear in a few days. Unless swallowing issue becomes very bad, maybe best just to ride this one out. If you're recovering from an infection this will make you feel weak and tired. Make sure you get enough vitamin c and plenty of rest. Hope this answers your question.