Stuffy head and throat tightness (feel as if a hand is on my throat) since kast night, is this aller?

Multiple things: Upper respiratory illness, allergic or chronic rhinitis and reflux are three possibilities. Also some patients with obstructive sleep apnea may have this as well.

Possibly!: Especially if you have a history of food hypersensitivity, and there is a chance that you ate something that you know you are allergic to last night, and this is sudden onset, then you need to probably call your doctor right away, and/or go to the er. Since it's been awhile, though, it will probably improve, but call your doctor, who will advise on medication if needed.