I was told my tooth was cold sensitive due to an abscess above my root on an upper back molar. The dentist wanted to do a root canal, I had had two very bad experiences with root canals so I chose extraction after a week of antibiotics. Today, after my tooth was removed, when I make a sucking motion in my mouth air came thru the hole the tooth used to be in from my NOSE. I told the nurse who then told me to hold my nose and blow. Sure enough, air came out of the hole, she could hear it. So I was told my root had perforated my sinus cavity. The dentist then put a bone graft in and sewed it semi shut and sent me on my way with antibiotics and pain medications. Should I see a doctor about this? Is this a common occurrence?