In case of a mild allergy, it is clear that you can use over the counter medication. Look for solutions on websites like http://www.superallergymedicine.com/ and for sure you will find something viable for you.
If the condition does not subside and the allergy gets really severe, the best way is to consult a doctor. It is clear that the OTC drugs have to be taken with great care and in a controlled amount. Some of the medicines may have side effects like drowsiness. In case the effect is really severe, you have to reach for medical help right away.