How to unswell nostrils?

the back of my nostrils have been swollen since i was a little girl. i have really bad allergies.nasal sprays give me headaches, i have tried zyrtec, benderyl, claritin d, allegra (which i got immune to after like a day of using it, didn't do jack afterwards) and knock off versions. non of them seem to help with my congestion. i was wondering, if there is a non surgical way to unswell my nostrils or a better remedy to help me with my allergies. besides seeing the allergist. i don't have enough for that right now. i'm tired of how bad my allergies are. because my nostrils are swollen in the back, if my allergies are acting up at the same time, i can't breathe through my nose, to i have to breathe through my mouth. it's horrible because if i'm trying to eat, i have to eat and breathe at the same time and i cant even taste my food. if i try to drink, i choke sometimes or my throat hurts when i drink bc my nose is blocked. i can't sleep well, i always sniffle in the morning, afternoon, and night. i hate it. i need something that REALLY works. please help me. :/