Shooting nipple pain while feeding when baby latches on.?

My Dr. is out of his office for the holidays and the La Leche League hotline is off for the holidays as well. I have been doing pretty good with feeding until a few days ago. As soon as the baby latches on i get a horrible shooting pain in my that lasts about 30 secs. By today it has become absolutely unbearable (like i get a hot flash and feel like Im going to p out) to the point where i have to pump my milk and feed it to him in a bottle. I feed him about 3 ounces every 3 hours (which is all i can really get for some reason) and he is still hysterical and hungry afterwards. I looked up the symptoms of thrush and thought maybe I had that but the baby doesnt have any white spots in his mouth or anything. Is this just something that normally happens to some women? Should I just suck it up and let him feed on the in hopes that the pain will go away soon or should I keep pumping? Any advice you could give me would be so helpful because this is getting me so upset.