Do I have allergies!

I have never had allergies in 23 years. I've always had multiple cats and dogs in my house. Ive never had any reactions to any kind of pollen or anything outside. I've never even had food or material allergies, but recently the outside of my nostril is insanley itchy and sometimes it causes me to sneeze i do have sensitive skin so i put some oatmeal lotion on my face but it doesnt help the itching i don't havewatery eyes and I don't have any issues feeling drowsy or anything. My nose is alittle runny
Sometimes and my sinus' bother me sometimes but thats it. It's december and winter where I live and pretty much all plant life is dead. I have one cat in my apartment that I've had for a while. Does this mean I have allergies? Do allergies just show up out of nowhere? I know the body changes chemically every 7 years. When I turned 21 I suddenly had a slight intolerance for cream but this problem just started
Maybe a month ago. Please help!

I know allergies can just show up and alot to do with what you have in your home you are using. Alot of the everyday things we use contain chemicals and toxins and such that will trigger these allergies. I have a son that developed asthma, and sinus issues. I switched stores and buy my every day items, not food at this online store. This company specializes in helping people with allergies and created it for people to live a safer and heathier home. All products dont contain any chemicals that can trigger allergies. You should check it out. If you want more information, contact me.