@burcinc-- Do you ever steam clean carpets? I would advise against that because I heard that if someone is allergic to mold, steam cleaning carpets will lead to mold growth in the carpet and cause more allergy symptoms.
Unfortunately, vacuuming isn't the best solution either because mites can remain in the air and return to the carpet soon after vacuuming.
If you know that the carpet is aggravating your allergies, the best solution is to get rid of it. Wood floors or ceramic floors are much healthier.