I have excrutiating pain in my upper stomach ... It last for about 1-2 minutes, then goes away, but has been happening several times, all day... I have also had black stools and I know this means blood ... I checked my temp and it was above average, but not too high (99.8F). I have never had one, but I think this might possibly be an ulcer ... What do you think? I don t have a primary Doctor, should I go to Urgent Care tomorrow?