Is there still hay fever around?

I've had stinging eyes, blocked nose/sinuses, and feeling really sleepy for some weeks now. I usually get hit by hay fever from February to April-May, but is it still going now?

I would suggest to ask medical questions to a doctor.
Allergens ate out there every day, it just depends what allergens trigger your allergies and they might be different from the ones you are used to in your home country.
But obviously your symptoms might also indicate something completely different. That's why I'd suggest a visit to a doctor.

Get well soon!

Hayfever often occurs in autumn time.
I often use this nasal spray.
https://www.catalog-taisho.com/04715.php

It is my understanding that Japanese pharmacists understand common terms, such as antihistamine, though brand names might not be recognized. Over the counter drugs include loratadine and fexofenadine. But they are often sold at half the dosage you'd find elsewhere, meaning loratadine may be sold in 5 mg pills whereas the standard dosage elsewhere is 10 mg. The simple solution is to take two pills. It is best to have the drug names written, to show the pharmacist, and in English is OK.

Tokyo friend

That's good medicine, thanks!

We have mainly two hay fever seasons in spring and autumn in Japan.
Firstly hay fever caused by ceder tree pollen begins and one caused by cypress tree pollen follows in spring.
In early autumn, hay fever caused by gramineous plants pollen begins.
Your symptom may be related to hay fever caused by gramineous plants pollen.
Take care of yourself.