hi there, I am wondering if you can help me. I went to the dentist this morning, had 2 pain relief infections in the upper gum and a tooth repaired [part filling replaced]. Since then I have had sinus pain, stuffy head, sneezing, running nose, and blowing my nose all the time - on the side that I had the injections. I have never experienced this before with pain injections. When should I expect the problem to subside ? Thanks.