Do you know what is causing it? It may be diet or allergy related for instance. Mine is allergy related and I use four options. The first is Sterimar which is a saline nasal spray. I add in Beconase nasal spray to decongest if needed. If I have got face pain and headache with it, then I take an oral decongestant/painkiller mix instead of the Beconase and if its hay fever with itchy running eyes as well then I use an antihistamine tablet instead of the decongestant/painkiller.
If your only problem is nasal...blockage, discharge or headache, then Otrivine nasal spray or Ephedrine nasal spray will reduce the blockage and Tablets of Ibuprofen will relieve your headache.
Did you try Sudafed? I often get sinus problems rather than a normal cold but can't take Sudafed - they make be feel like I'm plugged into an electric socket.