I don't know what is available to you in Belgium, but in the US we have many over the counter allergy medications that might be able to help you. Claritin and Zyrtec are 2 brand names. I use Claritin if my allergies act up.
Some of these medications may make you sleepy. It's a once a day medication so I would take it before bed and by the time I woke up the sleepiness wore off but the medication was still effective all day.
Holly, Misty & their friend, Jake, the dog.
Onyx, Callie May, Maggie & Kobi forever in my heart.
Yes, I know I need a new signature pic...someday...