If this is your first year with allergies, I'd think it'd be a lot easier for you than for someone like me--I've had them since my early teens. I expect them to go away in a couple years, but I've had a lot of stuff to fix and I'm not there yet.
Folate and B12 can help, they support methylation which breaks down histamine. When I ran out of my B12 supp, my allergies really got bad, and a new bottle fixed the issue within two days--but it just got me back to my baseline. Folate's the other half of that, and I was taking that the whole time. You may see improvement with a multi with folate. Vit C helps with related issues, so that's worth a shot too.
Fun, easy page on folate and methylation (with related pages on the left)...
http://www.detoxpuzzle.com/methyl.php
Some people find that removing a subtle, low-level food allergen helps. I think I've removed all my food allergens, but I've had the allergies for years, and I saw other improvements by getting rid of gluten and dairy.
And something like acupuncture could help too, I haven't used it for this, but I'm seeing improvements in other areas.
eta: and maybe check your vit D and get it into a good part of the range? I've never read about it specifically related to allergies, but it's important for immune function, and this is an immune function oddity, and it's worthwhile for other reasons, if you haven't done it already.