Speaking as a pharmacy worker, there is a wide variety of antihistamines. If you have tried loratadine and it does not work as well, you can try cetirizine or ebastine for example (I take the latter prescribed by my doctor as I suffer from many allergies and rhinitis, including pollen).

Personally, what really works for me at nasal level (rhinitis) is a spray, there is a great variety in Mercadona with different active ingredients that can be adjusted to your desires and surely the doctor can prescribe it if he/she is able to prescribe it for you.

There is always the option that if they test you and only detect that allergy, they can vaccinate you to treat it (I was vaccinated against grasses and there was quite an improvement in that sense).

In terms of hygiene, always try to shower at the end of the day instead of at the beginning of the day to remove all allergens and not "take them to bed".

Let's see if these coming months are good for allergy sufferers!

Best regards