Allergic to Oklahoma!

So I recently moved to Oklahoma from Alabama about a year and a half ago. I've never had any problem with my allergies until now. In fact I hardly ever even get sick, but since moving here I've had none stop allergy problems. Drainage, stuffy nose, you name it. I take Claritin, and it's not helping. Has anyone else moved to a new region and expirenced this? If so, did it eventually stop? Because I swear if I sneeze one more time my eyeballs will explode!