### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
for the last four days i have been having chest pains. the type of pain that just feels like a bad bruise on the inside and eventually makes my upper back hurt. i feel weak and shakier than usual. my nose started bleeding monday night and then again tuesday morning. i have been throwing up after i eat since saturday night. and my stomach feels fine until then. i went to the er and they took chest xrays and did a pregnancy test which as negative. the xrays showed no concern so i really dont know whats going on.

### output:

Hello there, Thanks for posting on Chat Doctor, From your description you are having a chest pain that is probably due to peptic ulcer diseases (PUD) or gastroesophageal reflux diseases (HERD) or acute gastritis or acute esophagitis. If you had precised the exact location of the pain or where it pains most (like the pain is retrosternal) it will orient us better into determining the origin of the pain. If the pain is more on the ribs, then it might be acute Costco Chat Doctor.  Normally before performing an X-ray, doctor had to examine you physically and locate the area where the pain is most intense either by properly interviewing you and/or examining you before requesting for X-rays or laboratory tests, as this would have oriented the exams asked. I suggest you still get back to the hospital and get examined properly. As if any of the above-mentioned conditions are responsible appropriate treatment will be required. If acute PUD or HERD or Gastritis then proton pump inhibitors such as omeprazole or h2 inhibitors such as raiding and/or associated to antacids to treat the affection will be required. Running a test to determine the presence of H. pylori will also be important to determine infectious cause of the gastritis. Hope this helps