Why do I have pain, swelling and bleeding after a permanent bridge has been put in?

My front tooth had a root canal 30+ years ago. That tooth was removed and replaced by a (pontic). I had a temporary bridge for 6 months and the permanent bridge was put in 8 weeks ago. I am in a lot of pain around the gums of all three teeth, there is a lot of bleeding, throbbing and a numbness in my nose. I cannot bite down where the bridge is and my teeth feel swollen on the back side. I am in a lot of discomfort and need would like to know what questions I need to be asking my dentist.