Five hours ago, my husband (age 51) had flossed out a piece of meat between two upper molars which cause some bleeding. He just woke up and found 3-4 cm blood clot had formed and he pulled it off and now it wont stop bleeding. He has rinsed with mouthwash and salt water, still it bled. As I am typing now, he said it feels like it is clotting again. He had a stroke on November 3, 2012 and is on blood pressure medication. Should he go to the ER? .