It sounds like you have some kind of blockage in your sinuses, appoint a doctor and demand a check of your nostrils and sinuses.
If they persist prescribing cortisone and you feel that you don't have an inflammation in there (in the nose) as a whole, then you'll really have to beat it into their heads that your sinuses are stuffed every hour round the clock.
The itchiness may be two things, leakiness in the gut or delayed allergy reaction.
Certainly a third option may be positive but leaky gut has pretty much those criterias.
I'm surprised that your tongue went pink relatively fast (if i got it right) but that just means that you'vegotten a good balance in your gut, which doesn't come freely until you've nailed the last bits of your symptoms.