It is very common to experience occasional menstrual changes, and they are usually easily managed. For immediate relief from severe pain, over-the-counter nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen are highly effective. To help regulate your cycle, a doctor may recommend hormonal options such as combined oral contraceptive pills or progestin therapy. Since hormonal treatments require a prescription and a proper evaluation to rule out common, highly treatable conditions like PCOS, I recommend consulting a gynaecologist. They can safely guide you toward the best treatment plan for your body.