Bleeding Ulcers.Deadly.

After several months...I finally got a doctor to do an endoscopic test on me, he found two bleeding ulcers the size of quarters in me, he said they were at the point of rupturing that my life was in danger, he also informed me that the hospital when they did my ultra sound on me that they should have seen them back in september when I had it done...now the doctor said I am a ticking time bomb that if they rupture I will die....he doesn't understand why nobody would do anything about this in september, that they should have treated me back when I was having the problems and they didn't do anything...What can I do, is there anything I can do about this, they had to do a biopsy on my ulcer because I have loosing allot of blood.... For four months I have had this problem and nobody would do anything about it, they kept telling me that I wasn't in any pain and that they couldn't find anything, but this doctor told me that he said they should have seen them on the ultra sound and x ray because of how big they were, he even pulled my records from back then and he seen them on the ultra sound..but the doctors didn't treat me or do anything they said all my test were fine....if he could see them how come the other doctors couldn't...my question is what can I do, because now I am living in fear that my ulcers will explode, I have to be very careful on everything and I can not take any medicine what so ever... Please any information would be helpful...