I too am allergic to cats,and have de-sensitized myself by having four, of course i never knew this would happen, i still have the sneezes at times and if i touch them then touch my eyes, wow look out, swollen,itchy eyes are ahead, i don't have real problems with breathing though.

Just take all the others suggestions in mind, to be honest i do nothing except take an antihistimine now and then, Lexie sleep on the end of the bed every single night, i just decided to throw myself in the deep end i guess, and it has worked for me, my tolerances have built up and i am way less allergic than i used to be, so don't give up hope.