Hi there!
Well, without knowing the relevant clinical details or a detailed clinical evaluation it would be difficult to comment specifically on the situation. I would suggest considering an initial evaluation by an internist or a haematologist to classify the type of anemia. If bleeding/ hemorrhage is suspected as a cause, further investigation to look at the cause of bleeding can be planned. For GI bleeding upper and lower GI endoscopies may be suggested as primary investigations. I would suggest discussing the situation and the suggested management plan in detail with your treating doctor.
Hope this is helpful.
Take care!