I recently have a anxiety attack..HELP?

my case is really weird and i am only 16yo. I believe it isnt school stress or whatever that cause this. Almost every 2 month i have a reclaspe. it invloved unnesscarily using the inner nose muscle to actually exhale or blow from my nose. its really stupid, i told my parents they said why must you do that. They said the cure is just stop doing it. But how. Its very very contagious and hard to stop and i am sick and tired of it.I feel like crying sometimes this always continues, it afffects everything from my mood, looks, concentration in cl and everything i do. Do you have a remedy that effectivesly deal with this problem. Its stupid really and i hate myself. its doesnt seem like OCD coz it occur only once in a while. And it happens without notice.i cant control it