Experiencing heavy bleeding for 20 days can be concerning, but please stay calm as this is a highly treatable issue. Because the right medicine depends on the exact cause, you should consult a doctor promptly for an evaluation. Generally, doctors may prescribe tranexamic acid to reduce bleeding quickly, or NSAIDs like ibuprofen to manage flow and discomfort. Hormonal therapies, such as oral contraceptives or progestins, are also commonly used to regulate your cycle. Additionally, iron supplements may be recommended to prevent anemia. Please avoid self-medicating and seek immediate care if you feel dizzy, unusually fatigued, or short of breath.