Ent is not the doctor to say and you don't want to wait that amount of time.This can be errosive esophagitis, or GERD with stomach ulcer.
These can bleed, particularly the ulcer and you already have blood that you threw up.
Throwing up blood even a small amount, needs immediate evaluation.And follow up with a GI doctor, an ENT can not do the scope required, if required.
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