Working in plant science I know some people have a worse reaction over time to the pollen.

I know if I'm stung by a bee the allergic reaction gets more severe each time I'm stung too.

The ability of your body to create an allergic reaction increases since memory cells that produce the antibodies in response to the allergen increase in numbers. You might be more allergic because of this or maybe there are more pollen producing plants around your area now - or some new species.

Someone in your area very proud of their garden

I'm not sure how physical damage to your nose would be responsible - maybe if the damage has changed your nose so it can inhale pollen more easily?