Stomach Cancer:
Although it is not clear what specifically causes stomach cancer, having a lot of salted and processed foods in the diet along with having long-term standing acid reflux (the patient has GERD), which hurts the inside lining of the stomach, can aid in getting it.
The patient fits the description of stomach cancer because she has had symptoms of vomiting, severe abdominal pain, weakness, being bloated, and lack of appetite. Not only that, but because the patient has been vomiting a lot, this could lead her to be dehydrated, which could be causing the dizziness. The brown-colored vomit could be a sign of internal bleeding, which could also be a cause of stomach cancer, along with the small amount of blood in her last bowel movement.
The patient hasn't mentioned whether she has had a hard time swallowing, so this might be a deterrent to stomach cancer. Along with the fact that men have a higher chance of getting stomach cancer rather than women. However, it is still very important to evaluate.
A comorbidity to stomach cancer is hypertension, which the patient has stated that she has had problems with it in the past.
An unknown piece to the picture would be test results. Once the test results are in, then I would have a better picture to what might be wrong with the patient. This would also solve the case for me.
I would recommend a X-ray at first based on the patients budget. However, if that shows an abnormal area then I would recommend an endoscopy. If the patient were to be able to get an endoscopy, we would be able to get a biopsy on the abnormal area and test to see whether it is cancer.
Depending on the size and location of the tumor, treatment could include surgery, chemotherapy, and/or radiation therapy.