I used to really suffer with hayfever, until taking part in a desensitisation trial. This is what the consultant advised:
1 Flixonase nasal spray, used for a couple of months BEFORE the symptoms usually start, can reduce your sensitivity to pollen, so you don’t get such severe symptoms in the first place.
2 Desloratidine (or the latest prescription-only antihistamine) will damp down the symptoms once they’ve actually started.
3 A VERY LOW DOSE of steroid (prednisolone) can be very effective in stopping the symptoms, but most GPs don’t seem to be aware of this.
4 Contact lenses will prevent the pollen getting in your eyes.
5 Frequent showers (twice a day) will remove the pollen from your hair and skin.
Hope this helps! It sounds like you’re allergic to tree pollen, btw.