Am i allergic to my cats?

Well i have cats and i always stoke them constantly. But about a couple of days ago i kept gettin a really stuffy, red, hurting nose and my keep wartering. At first i thought it was a cold but when i leave for school it bgets a bbit better but when i sleep with my cat it gets worse i think. Maybe im over reacting i don't know but... Also i'm not getting rid of my cats AT ALL, not a chance. So am i aleergic to my cats? Because it's only really jusy come on and it may just be a cold that just happens to seem worse at home but it could be just because i'm bored and focusing at it but i go thorugh loads of tissue at home and about 2 pieces ar school... Serious anwsers only please (-: