When i had my wisdom teeth out I woke up in a pool of blood and it wouldnt stop bleeding when I but down on gauze so rang the number they gave me and was told to go to hospital. There they soaked some gauze in adrenalin and made me bite on that and that seemed to work. They also gave me the rest of it in case I needed more but I didn't. If it stops when you bite down on gauze then I'd do that until it stops altogether unless it starts everytime you immediately take the gauze away then maybe ring them.