Suggest Treatment For Severe Teeth Pain

Hi Doc, I got dental bridge just last months and in terrible pain. I used to have anesthesia inject before this dental bridge but, never had swelling on my face. It seems that I have some kind of reaction from this bridge because after installing the bridge, doctor gave me anesthesia needle to extract another teeth. Second day I had bad swelling on my face where she injected the needle. I didn't took it seriously because I thought its the result of tooth extraction. But, yesterday I went to her again with lot of pain in my dental bridge area and with no swelling at all. She gave me anesthesia injection and grounded down my bridge teeth a little bit. Now again I have a lot of swelling with same pain on my face where she gave me injection. I asked her for another option but, she said that there is only bridge option. She prescribed me antibiotics the 2nd time and asked me to take pain killer if the pain worsen. Now please advise me if my assumption of getting reaction from the bridge is correct?? Should I remove my bridge or have root canal and keep the bridge as the doc suggested.

Thank you so much for your advise, time and help. Really appreciate.